Control device for human-powered vehicle and power transmission system

ABSTRACT

A human-powered vehicle includes a crank axle, a first rotational body, a wheel, a second rotational body, a transmission body that transmits a driving force between the first rotational body and the second rotational body, a derailleur configured to operate the transmission body to change a transmission ratio, a motor configured to drive the transmission body and an electric actuator configured to operate the derailleur. A control device has an electronic controller configured to control electric actuator and the motor. The electronic controller is configured to control the electric actuator and drive the transmission body with the motor so that the transmission ratio is changed in a predetermined shifting range in upon determining the derailleur has been actuated to change the transmission ratio and a predetermined condition related to pedaling is satisfied.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation application of U.S. patentapplication Ser. No. 17/120,730, filed on Dec. 14, 2020. The entiredisclosure of U.S. patent application Ser. No. 17/120,730 is herebyincorporated herein by reference. This application also claims priorityto Japanese Patent Application No. 2019-228121, filed on Dec. 18, 2019,and Japanese Patent Application No. 2020-183008, filed on Oct. 30, 2020.The entire disclosures of Japanese Patent Application Nos. 2019-228121and 2020-183008 are hereby incorporated herein by reference.

BACKGROUND Technical Field

The present invention generally relates to a control device for ahuman-powered vehicle and a power transmission system.

Background Information

Japanese Laid-Open Patent Publication No. 2008-222211 (PatentDocument 1) discloses an example of a human-powered vehicle including aderailleur that operates a transmission body to change the transmissionratio.

SUMMARY

One object of the present disclosure is to provide a control device fora human-powered vehicle and a power transmission system that change thetransmission ratio in a preferred manner.

A control device in accordance with a first aspect of the presentdisclosure is for a human-powered vehicle. The human-powered vehicleincludes a crank axle, a first rotational body connected to the crankaxle, a wheel, a second rotational body connected to the wheel, atransmission body engaged with the first rotational body and the secondrotational body to transmit driving force between the first rotationalbody and the second rotational body, a derailleur configured to operatethe transmission body to change a transmission ratio of a rotationalspeed of the wheel to a rotational speed of the crank axle, and a motorconfigured to drive the transmission body. The control device comprisesan electronic controller configured to control the motor and drive thetransmission body with the motor so as to increase a rotational speed ofthe motor as a difference of a first rotational speed, which iscalculated in correspondence with a rotational speed of the wheel andthe transmission ratio, and a predetermined rotational speed or arotational speed in a predetermined range increases upon determining thederailleur has been actuated to change the transmission ratio and apredetermined condition related to pedaling is satisfied. The controldevice in accordance with the first aspect is configured to control themotor and drive the transmission body with the motor in a case where thederailleur is actuated to change the transmission ratio and thepredetermined condition related to pedaling is satisfied. This changesthe transmission ratio in a preferred manner. The control device inaccordance with the first aspect is configured to control the motor anddrive the transmission body so as to increase the rotational speed ofthe motor as the difference of the first rotational speed, which iscalculated in correspondence with the rotational speed of the wheel andthe transmission ratio, and the predetermined rotational speed or therotational speed in the predetermined range increases. This changes thetransmission ratio in a preferred manner.

In accordance with a second aspect of the present disclosure, thecontrol device according to the first aspect is configured so that thefirst rotational speed, the predetermined rotational speed, and therotational speed in the predetermined range correspond to a rotationalspeed of the crank axle. With the control device according to the secondaspect, the motor is controlled in correspondence with the rotationalspeed of the crank axle in a preferred manner.

In accordance with a third aspect of the present disclosure, the controldevice according to the second aspect is configured so that thepredetermined rotational speed and the rotational speed in thepredetermined range are 50 rpm or greater and 80 rpm or less. Thecontrol device according to the third aspect allows the user to easilymaintain the rotational speed of the crank axle at a rotational speed of50 rpm or greater and 80 rpm or less.

In accordance with a fourth aspect of the present disclosure, thecontrol device according to any one of the first to third aspects isconfigured so that the human-powered vehicle further includes a firstoperating device. The electronic controller is configured to control themotor so as not to drive the transmission body upon determining a firstoperating device of the human-powered vehicle has been operated toprevent actuation of the derailleur to change the transmission ratio andthe predetermined condition related to pedaling is satisfied. Thecontrol device in accordance with the fourth aspect is configured tocontrol the motor so as not to drive the transmission body if theoperating device is operated even in a case where the derailleur isactuated to change the transmission ratio and the predeterminedcondition related to pedaling is satisfied. This reduces the frequencyof driving the motor.

In accordance with a fifth aspect of the present disclosure, the controldevice according to the fourth aspect is configured so that theelectronic controller is configured to be switchable between a firstmode and a second mode. The electronic controller is configured tocontrol the motor in the first mode so as to drive the transmission bodyin correspondence with a state of the human-powered vehicle upondetermining a second operating device of the human-powered vehicle hasbeen operated to actuate the derailleur and the predetermined conditionrelated to pedaling is satisfied. The electronic controller isconfigured to control the motor in the second mode so as not to drivethe transmission body even upon determining the second operating devicehas been operated and the predetermined condition related to pedaling issatisfied. The control device in accordance with the fifth aspect allowsthe user to switch between the first mode and the second mode to selectwhether the transmission body is driven by the motor to performshifting.

In accordance with a sixth aspect of the present disclosure, in thecontrol device according to any one of the first to fifth aspects, theelectronic controller is configured to control the motor so as to stopdriving the transmission body with the motor in correspondence with aload on the motor upon determining the derailleur has been actuated tochange the transmission ratio and the predetermined condition related topedaling is satisfied. The control device in accordance with the sixthaspect controls the motor and stops driving the transmission body withthe motor in correspondence with the load on the motor in a case wherethe derailleur is actuated to change the transmission ratio and thepredetermined condition related to pedaling is satisfied. The controldevice in accordance with the sixth aspect avoids propelling thehuman-powered vehicle with only the motor.

In accordance with a seventh aspect of the present disclosure, thecontrol device according to the sixth aspect further comprises a firstdetector configured to detect the load on the motor. The electroniccontroller is configured to control the motor and stop the motor if thederailleur is actuated to change the transmission ratio upon determiningthe predetermined condition related to pedaling is satisfied and theload on the motor is greater than or equal to a predetermined load. Thecontrol device in accordance with the seventh aspect controls the motorand stops the motor if the derailleur is actuated to change thetransmission ratio in a case where the predetermined condition relatedto pedaling is satisfied and the load on the motor is greater than orequal to the predetermined load. The control device in accordance withthe seventh aspect avoids propelling the human-powered vehicle with onlythe motor.

In accordance with an eighth aspect of the present disclosure, in thecontrol device according to any one of the first to seventh aspects, theelectronic controller is configured to control the motor so as to stopdriving the transmission body upon determining a vehicle speed of thehuman-powered vehicle is less than or equal to a first speed or therotational speed of the wheel is less than or equal to a predeterminedrotational speed, and upon determining the predetermined conditionrelated to pedaling is satisfied. The control device in accordance withthe eighth aspect controls the motor so as to stop driving thetransmission body if the vehicle speed of the human-powered vehicle isless than or equal to the first speed or the rotational speed of thewheel is less than or equal to the predetermined rotational speed in acase where the derailleur is actuated to change the transmission ratioand the predetermined condition related to pedaling is satisfied. Thecontrol device in accordance with the eighth aspect restricts shiftingin a case where the vehicle speed of the human-powered vehicle is low.

In accordance with a ninth aspect of the present disclosure, the controldevice according to any one of the first to eighth aspects is configuredso that the electronic controller is configured to control an electricactuator of the human-powered vehicle to operate the derailleur. Thecontrol device in accordance with the ninth aspect controls the electricactuator to operate the derailleur.

In accordance with a tenth aspect of the present disclosure, in thecontrol device according to the ninth aspect, the electronic controlleris configured to be switchable between a first shifting mode, in whichthe electronic controller controls the electric actuator in accordancewith a state of the human-powered vehicle, and a second shifting mode,in which the electronic controller controls the electric actuator inaccordance with operation of a transmission operating device provided onthe human-powered vehicle. The electronic controller is configured to beswitchable between a third mode and a fourth mode in the first shiftingmode. In the third mode, the electronic controller is configured tocontrol the motor and drive the transmission body in accordance with thestate of the human-powered vehicle upon determining the derailleur hasbeen actuated to change the transmission ratio and the predeterminedcondition related to pedaling is satisfied. In the fourth mode, theelectronic controller is configured to control the motor so as not todrive the transmission body even in upon determining the derailleur hasbeen actuated to change the transmission ratio and the predeterminedcondition related to pedaling is satisfied. With the control device inaccordance with the tenth aspect, in the first shifting mode, the usercan switch between the third mode in which the transmission body isautomatically driven and the fourth mode in which the transmission bodyis driven by the user.

In accordance with an eleventh aspect of the present disclosure, in thecontrol device according to the ninth aspect, the electronic controlleris configured to control the motor and the electric actuator so thatrelative movement of the derailleur and at least one of the firstrotational body and the second rotational body is started simultaneouslyas the motor is driven or before the motor is driven upon determiningthe electric actuator and the motor are controlled to change thetransmission ratio and a predetermined condition related to pedaling issatisfied. The control device in accordance with the eleventh aspectcontrols the motor and the electric actuator so that relative movementof the derailleur and at least one of the first rotational body and thesecond rotational body is started simultaneously as the motor is drivenor before the motor is driven. This changes the transmission ratio in apreferred manner.

In accordance with a twelfth aspect of the present disclosure, in thecontrol device according to the ninth aspect, the controller isconfigured to control the motor and drive the transmission body with themotor upon determining the derailleur has been actuated to change thetransmission ratio and the predetermined condition related to pedalingis satisfied. The controller is configured to control the electricactuator so that a shift stage of the derailleur approaches apredetermined shift stage or the transmission ratio approaches apredetermined transmission ratio upon determining the human-poweredvehicle is decelerated. The controller is configured to control theelectric actuator and change the shift stage of the derailleur one stageat a time upon determining either a difference of the predeterminedshift stage and a present shift stage of the derailleur or a differenceof the predetermined transmission ratio, and the present transmissionratio is less than or equal to a predetermined value. The controller isconfigured to control the electric actuator so as to continuouslyactuate the derailleur over a plurality of shift stages upon determiningeither a difference of the predetermined shift stage and a present shiftstage of the derailleur or a difference of the predeterminedtransmission ratio, and the present transmission ratio exceeds thepredetermined value. The control device in accordance with the twelfthaspect controls the electric actuator so as to continuously actuate thederailleur over a plurality of shift stages in a case where thedifference of the predetermined shift stage and the present shift stageof the derailleur or the difference of the predetermined transmissionratio and the present transmission ratio exceeds the predeterminedvalue. The control device in accordance with the twelfth aspect reducesthe time for changing the present shift stage to a preferred shift stageor the time for changing the present transmission ratio to a preferredtransmission ratio.

In accordance with a thirteenth aspect of the present disclosure, in thecontrol device according to any one of the first to twelfth aspects, thepredetermined condition related to pedaling is satisfied in at least oneof a case where a human driving force input to the crank axle is lessthan or equal to a predetermined driving force, a case where arotational speed of the crank axle is less than or equal to a secondrotational speed, and a case where the crank axle is oscillating. Thecontrol device in accordance with the thirteenth aspect drives the motorin at least one of a case where human driving force input to the crankaxle is less than or equal to the predetermined driving force, a casewhere the rotational speed of the crank axle is less than or equal tothe second rotational speed, and a case where the crank axle isoscillating. This changes the transmission ratio in a preferred manner.

In accordance with a fourteenth aspect of the present disclosure, in thecontrol device according to any one of the first to thirteenth aspects,the electronic controller is configured to control the motor to apply apropulsion force to the human-powered vehicle in accordance with a humandriving force, and the electronic controller is configured to drive thetransmission body so as not to apply the propulsion force to thehuman-powered vehicle upon determining the derailleur has been actuatedto change the transmission ratio and the predetermined condition relatedto pedaling is satisfied. The control device in accordance with thefourteenth aspect controls the motor and drives the transmission body soas not to apply the propulsion force to the human-powered vehicle in acase where the derailleur is actuated to change the transmission ratioand the predetermined condition related to pedaling is satisfied. Thecontrol device in accordance with the fourteenth aspect reduces thepower consumption of the motor.

A power transmission system in accordance with a fifteenth aspect of thepresent disclosure is for a human-powered vehicle. The powertransmission system comprises the control device according to any one ofthe first to fourteenth aspects and a first one-way clutch provided in afirst power transmission path between the crank axle and the firstrotational body and configured to transmit rotational force from thecrank axle to the first rotational body in a first rotational directionand restrict transmission of rotational force from the first rotationalbody to the crank axle in the first rotational direction. The powertransmission system in accordance with the fifteenth aspect changes thetransmission ratio in a preferred manner. The power transmission systemin accordance with the fifteenth aspect restricts transmission ofrotational force of the first rotational body to the crank axle with thefirst one-way clutch in a case where the first rotational body isrotated by the motor. This changes the transmission ratio in a preferredmanner in a case where the motor is driven to change the transmissionratio.

In accordance with a sixteenth aspect of the present disclosure, thepower transmission system according to the fifteenth aspect furthercomprises a second one-way clutch provided in a second powertransmission path between the second rotational body and the wheel andconfigured to transmit rotational force from the second rotational bodyto the wheel in a second rotational direction corresponding to the firstrotational direction and restrict transmission of rotational force fromthe wheel to the second rotational body in the second rotationaldirection. In the power transmission system in accordance with thesixteenth aspect, the second one-way clutch allows relative rotation ofthe second rotational body and the wheel. This changes the transmissionratio in a preferred manner in a case where the motor is driven tochange the transmission ratio.

A control device in accordance with a seventeenth aspect of the presentdisclosure is for a human-powered vehicle. The human-powered vehicleincludes a crank axle, a first rotational body connected to the crankaxle, a wheel, a second rotational body connected to the wheel, atransmission body engaged with the first rotational body and the secondrotational body and configured to transmit driving force between thefirst rotational body and the second rotational body, a derailleurconfigured to operate the transmission body to change a transmissionratio of a rotational speed of the wheel to a rotational speed of thecrank axle, and a motor configured to drive the transmission body. Thecontrol device comprises an electronic controller configured to controlthe motor and drive the transmission body with the motor so as to changeat least one of a rotational angle of the motor and an output torque ofthe motor in correspondence with a state of the human-powered vehicleupon determining the derailleur has been actuated to change thetransmission ratio and a predetermined condition related to pedaling issatisfied. The control device in accordance with the seventeenth aspectis configured to control the motor and drive the transmission body withthe motor in a case where the derailleur is actuated to change thetransmission ratio and the predetermined condition related to pedalingis satisfied. This changes the transmission ratio in a preferred manner.The control device in accordance with the seventeenth aspect isconfigured to control the motor and drive the transmission body with themotor to change at least one of the rotational angle of the motor andthe output torque of the motor in correspondence with the state of thehuman-powered vehicle. This changes the transmission ratio in apreferred manner.

In accordance with an eighteenth aspect of the present disclosure, thecontrol device according to the seventeenth aspect is configured so thatthe state of the human-powered vehicle includes the rotational speed ofthe wheel and the transmission ratio. The electronic controller isconfigured to control the motor so as to increase at least one of therotational angle of the motor and the output torque as a difference of afirst rotational speed, which is calculated in correspondence with therotational speed of the wheel and the transmission ratio, and apredetermined rotational speed or a rotational speed in a predeterminedrange increases. The control device in accordance with the eighteenthaspect is configured to control the motor so as to increase therotational speed of the motor as the difference of the first rotationalspeed, which is calculated in correspondence with the rotational speedof the wheel and the transmission ratio, and the predeterminedrotational speed or the rotational speed in the predetermined rangeincreases. This changes the transmission ratio in a preferred manner.

In accordance with a nineteenth aspect of the present disclosure, thecontrol device according to the seventeenth or eighteenth aspect isconfigured so that the state of the human-powered vehicle includes achange in a vehicle speed of the human-powered vehicle or a change inthe rotational speed of the wheel. The electronic controller isconfigured to control the motor so as to increase at least one of arotational angle of the motor and an output torque as an acceleration ora deceleration of the human-powered vehicle increases in a travelingdirection or an acceleration or a deceleration of the rotational speedof the wheel increases in a rotational direction corresponding to thetraveling direction of the human-powered vehicle. The control device inaccordance with the nineteenth aspect is configured to control the motorso as to increase at least one of the rotational angle of the motor andthe output torque as the acceleration or deceleration of thehuman-powered vehicle increases in the traveling direction or theacceleration or deceleration of the rotational speed of the wheelincreases in the rotational direction corresponding to the travelingdirection of the human-powered vehicle. This changes the transmissionratio in a preferred manner.

A control device in accordance with a twentieth aspect of the presentdisclosure is for a human-powered vehicle. The human-powered vehicleincludes a crank axle, a first rotational body connected to the crankaxle, a wheel, a second rotational body connected to the wheel, atransmission body engaged with the first rotational body and the secondrotational body and configured to transmit driving force between thefirst rotational body and the second rotational body, a derailleurconfigured to operate the transmission body to change a transmissionratio of a rotational speed of the wheel to a rotational speed of thecrank axle, and a motor configured to drive the transmission body. Thecontrol device comprises an electronic controller configured to controlthe motor. The electronic controller is configured to drive thetransmission body with the motor in a case where the derailleur isactuated to change the transmission ratio and a predetermined conditionrelated to pedaling is satisfied. The electronic controller isconfigured to stop driving the transmission body with the motor incorrespondence with load on the motor. The control device in accordancewith the twentieth aspect is configured to control the motor and drivethe transmission body with the motor upon determining the derailleur hasbeen actuated to change the transmission ratio and the predeterminedcondition related to pedaling is satisfied. This changes thetransmission ratio in a preferred manner. The control device inaccordance with the twentieth aspect controls the motor and stopsdriving the transmission body with the motor in correspondence with theload on the motor in a case where the derailleur is actuated to changethe transmission ratio and the predetermined condition related topedaling is satisfied.

A control device in accordance with a twenty-first aspect of the presentdisclosure is for a human-powered vehicle. The human-powered vehicleincludes a crank axle, a first rotational body connected to the crankaxle, a wheel, a second rotational body connected to the wheel, atransmission body engaged with the first rotational body and the secondrotational body and configured to transmit driving force between thefirst rotational body and the second rotational body, a derailleurconfigured to operate the transmission body to change a transmissionratio of a rotational speed of the wheel to a rotational speed of thecrank axle, and a motor configured to drive the transmission body. Thecontrol device comprises an electronic controller configured to controlthe motor and drive the transmission body with the motor so as to changea rotational speed of the motor in correspondence with acceleration ofthe human-powered vehicle in a traveling direction and increase therotational speed of the motor as the acceleration of the human-poweredvehicle increases upon determining the derailleur has been actuated tochange the transmission ratio and a predetermined condition related topedaling is satisfied. The control device in accordance with thetwenty-first aspect is configured to control the motor and drive thetransmission body with the motor in a case where the derailleur isactuated to change the transmission ratio and the predeterminedcondition related to pedaling is satisfied. This changes thetransmission ratio in a preferred manner. The control device inaccordance with the twenty-first aspect is configured to control themotor and drive the transmission body with the motor to increase therotational speed of the motor as the acceleration of the human-poweredvehicle increases. This changes the transmission ratio in a preferredmanner.

A control device in accordance with a twenty-second aspect of thepresent disclosure is for a human-powered vehicle. The human-poweredvehicle includes a crank axle, a first rotational body connected to thecrank axle, a wheel, a second rotational body connected to the wheel, atransmission body engaged with the first rotational body and the secondrotational body and configured to transmit driving force between thefirst rotational body and the second rotational body, a derailleurconfigured to operate the transmission body to change a transmissionratio of a rotational speed of the wheel to a rotational speed of thecrank axle, a motor configured to drive the transmission body, and afirst operating device. The control device comprises an electroniccontroller configured to control the motor and drive the transmissionbody with the motor upon determining the derailleur has been actuated tochange the transmission ratio and a predetermined condition related topedaling is satisfied. The electronic controller is configured tocontrol the motor so as not to drive the transmission body if the firstoperating device is operated even upon determining the derailleur hasbeen actuated to change the transmission ratio and the predeterminedcondition related to pedaling is satisfied. The control device inaccordance with the twenty-second aspect is configured to control themotor and drive the transmission body with the motor upon determiningthe derailleur has been actuated to change the transmission ratio andthe predetermined condition related to pedaling is satisfied. Thischanges the transmission ratio in a preferred manner. The control devicein accordance with the twenty-second aspect is configured to control themotor so as not to drive the transmission body if the first operatingdevice is operated even upon determining the derailleur has beenactuated to change the transmission ratio and the predeterminedcondition related to pedaling is satisfied. This allows the user toselect whether to drive the transmission body with the motor to performshifting.

In accordance with a twenty-third aspect of the present disclosure, inthe control device according to the twenty-second aspect, the electroniccontroller is configured to control the motor so as not to drive thetransmission body during at least one of a period during which the firstoperating device is being operated and a predetermined period after thefirst operating device is operated even upon determining the derailleurhas been actuated to change the transmission ratio and the predeterminedcondition related to pedaling is satisfied. The control device inaccordance with the twenty-third aspect controls the motor so as not todrive the transmission body during at least one of the period duringwhich the first operating device is being operated and the predeterminedperiod after the first operating device is operated even upondetermining the derailleur has been actuated to change the transmissionratio and the predetermined condition related to pedaling is satisfied.With the control device in accordance with the twenty-third aspect, in acase where the user wants to reduce changes in the transmission ratio,changes in the transmission ratio are easily reduced by operating thefirst operating device.

In accordance with a twenty-fourth aspect of the present disclosure, inthe control device according to the twenty-second or twenty-thirdaspect, the electronic controller is configured to control the motor soas not to drive the transmission body if a first operating portionincluded in the first operating device is operated or a predeterminedoperation is performed on the first operating portion even upondetermining the derailleur has been actuated to change the transmissionratio and the predetermined condition related to pedaling is satisfied.The control device in accordance with the twenty-fourth aspect controlsthe motor so as not to drive the transmission body if the firstoperating portion of the first operating device is operated or thepredetermined operation is performed on the first operating portion evenupon determining the derailleur has been actuated to change thetransmission ratio and the predetermined condition related to pedalingis satisfied. With the control device in accordance with thetwenty-fourth aspect, in a case where the user wants to reduce changesin the transmission ratio, changes in the transmission ratio are easilyreduced by operating the first operating device.

A control device in accordance with a twenty-fifth aspect of the presentdisclosure is for a human-powered vehicle. The human-powered vehicleincludes a crank axle, a first rotational body connected to the crankaxle, a wheel, a second rotational body connected to the wheel, atransmission body engaged with the first rotational body and the secondrotational body and configured to transmit driving force between thefirst rotational body and the second rotational body, a derailleurconfigured to operate the transmission body to change a transmissionratio of a rotational speed of the wheel to a rotational speed of thecrank axle, and a motor configured to drive the transmission body. Thecontrol device comprises an electronic controller configured to controlthe motor to drive the transmission body with the motor upon determiningthe derailleur has been actuated to change the transmission ratio and apredetermined condition related to pedaling is satisfied, and isconfigured to control the motor so as to stop driving the transmissionbody upon determining a vehicle speed of the human-powered vehicle isless than or equal to a first speed or a rotational speed of the wheelis less than or equal to predetermined rotational speed. The controldevice in accordance with the twenty-fifth aspect is configured tocontrol the motor and drive the transmission body with the motor in acase where the derailleur is actuated to change the transmission ratioand the predetermined condition related to pedaling is satisfied. Thischanges the transmission ratio in a preferred manner. The control devicein accordance with the twenty-fifth aspect controls the motor to stopdriving the transmission body in a case where the vehicle speed of thehuman-powered vehicle is less than or equal to the first speed or therotational speed of the wheel is less than or equal to the predeterminedrotational speed. The control device in accordance with the twenty-fifthaspect restricts shifting in a case where the vehicle speed of thehuman-powered vehicle is low.

In accordance with a twenty-sixth aspect of the present disclosure, inthe control device according to the twenty-fifth aspect, the electroniccontroller is configured to control the electric actuator and drive thetransmission body with the motor so that the transmission ratio ischanged only in one of an increasing direction and a decreasingdirection upon determining the derailleur has been actuated to changethe transmission ratio and a predetermined condition related to pedalingis satisfied. With the control device in accordance with thetwenty-sixth aspect, the transmission ratio is changed only in one of anincreasing direction and a decreasing direction in a case where thepredetermined condition related to pedaling is satisfied. This reducesthe processing load on the electronic controller.

A control device in accordance with a twenty-seventh aspect of thepresent disclosure is for a human-powered vehicle. The human-poweredvehicle includes a crank axle, a first rotational body connected to thecrank axle, a wheel, a second rotational body connected to the wheel, atransmission body engaged with the first rotational body and the secondrotational body and configured to transmit driving force between thefirst rotational body and the second rotational body, a derailleurconfigured to operate the transmission body to change a transmissionratio of a rotational speed of the wheel to a rotational speed of thecrank axle, a motor configured to drive the transmission body, and anelectric actuator configured to operate the derailleur. The controldevice comprises an electronic controller configured to control theelectric actuator and the motor. The electronic controller is configuredto control the electric actuator and drive the transmission body withthe motor so that the transmission ratio is changed only in one of anincreasing direction and a decreasing direction upon determining thederailleur has been actuated to change the transmission ratio and apredetermined condition related to pedaling is satisfied. The controldevice in accordance with the twenty-seventh aspect is configured tocontrol the motor and drive the transmission body with the motor in acase where the derailleur is actuated to change the transmission ratioand the predetermined condition related to pedaling is satisfied. Thischanges the transmission ratio in a preferred manner. Further, with thecontrol device in accordance with the twenty-seventh aspect, thetransmission ratio is changed only in one of the increasing directionand the decreasing direction in a case where the predetermined conditionrelated to pedaling is satisfied. This reduces the processing load onthe electronic controller.

In accordance with a twenty-eight aspect of the present disclosure, inthe control device according to the twenty-sixth or twenty-seventhaspect, the electronic controller is configured to control the electricactuator and drive the transmission body with the motor so that thetransmission ratio is changed in a predetermined shifting range upondetermining the derailleur has been actuated to change the transmissionratio and the predetermined condition related to pedaling is satisfied.With the control device in accordance with the twenty-eight aspect, thetransmission ratio is changed in a suitable shifting range in a casewhere the predetermined condition related to pedaling is satisfied.

A control device in accordance with a twenty-ninth aspect of the presentdisclosure is for a human-powered vehicle. The human-powered vehicleincludes a crank axle, a first rotational body connected to the crankaxle, a wheel, a second rotational body connected to the wheel, atransmission body engaged with the first rotational body and the secondrotational body and configured to transmit driving force between thefirst rotational body and the second rotational body, a derailleurconfigured to operate the transmission body to change a transmissionratio of a rotational speed of the wheel to a rotational speed of thecrank axle, a motor configured to drive the transmission body, and anelectric actuator configured to operate the derailleur. The controldevice comprises an electronic controller configured to control theelectric actuator and the motor. The electronic controller is configuredto control the electric actuator and drive the transmission body withthe motor so that the transmission ratio is changed in a predeterminedshifting range upon determining the derailleur has been actuated tochange the transmission ratio and a predetermined condition related topedaling is satisfied. The control device in accordance with thetwenty-ninth aspect is configured to control the motor and drive thetransmission body with the motor in a case where the derailleur isactuated to change the transmission ratio and the predeterminedcondition related to pedaling is satisfied. This changes thetransmission ratio in a preferred manner. With the control device inaccordance with the twenty-ninth aspect, the transmission ratio ischanged in a suitable shifting range in a case where the predeterminedcondition related to pedaling is satisfied.

In accordance with a thirtieth aspect of the present disclosure, thecontrol device according to the twenty-eight or twenty-ninth aspect isconfigured so that the predetermined shifting range includes a rangethat is less than or equal to a predetermined third transmission ratio,and the predetermined third transmission ratio is less than a maximumone of the transmission ratio that is changeable by the derailleur. Thecontrol device in accordance with the thirtieth aspect reduces changesof the transmission ratio to the maximum one of the transmission ratio,which is changeable by the derailleur, in a case where the predeterminedcondition related to pedaling is satisfied. This limits excessiveincreases in the burden on the user.

In accordance with a thirty-first aspect of the present disclosure, inthe control device according to the twenty-sixth aspect, the electroniccontroller is configured to control the electric actuator and drive thetransmission body with the motor so that the transmission ratio ischanged in a predetermined shifting range in at least one of a casewhere the derailleur is actuated to change the transmission ratio, thepredetermined condition related to pedaling is satisfied, and a road onwhich the human-powered vehicle travels changes from an uphill to adownhill, and a case where the derailleur is actuated to change thetransmission ratio, the predetermined condition related to pedaling issatisfied, and a vehicle speed of the human-powered vehicle changes froman increasing state to a decreasing state. With the control device inaccordance with the thirty-first aspect, the transmission ratio issuitably changed in at least one of a case where the road on which thehuman-powered vehicle travels changes from an uphill to a downhill and acase where the vehicle speed of the human-powered vehicle changes froman increasing state to a decreasing state.

In accordance with a thirty-second aspect of the present disclosure, thecontrol device according to any one of the twenty-eight to thirty-firstaspects is configured so that the predetermined shifting range includesa range that is greater than or equal to a predetermined fourthtransmission ratio, and the predetermined fourth transmission ratio isgreater than a minimum one of the transmission ratio that is changeableby the derailleur. The control device in accordance with thethirty-second aspect reduces changes of the transmission ratio to theminimum one of the transmission ratio, which is changeable by thederailleur, in a case where the predetermined condition related topedaling is satisfied. This limits excessive increases in the rotationalspeed of the crank, which is rotated by the user.

In accordance with a thirty-third aspect of the present disclosure, inthe control device according to the thirty-second aspect, the electroniccontroller is configured to control the electric actuator and drive thetransmission body with the motor so that the transmission ratio ischanged in the predetermined shifting range in at least one of a casewhere the derailleur is actuated to change the transmission ratio, thepredetermined condition related to pedaling is satisfied, and a vehiclespeed of the human-powered vehicle is less than or equal to a sixthspeed, and a case where the derailleur is actuated to change thetransmission ratio, the predetermined condition related to pedaling issatisfied, and the rotational speed of the crank axle of thehuman-powered vehicle is less than or equal to a third rotational speed.With the control device in accordance with the thirty-third aspect, thetransmission ratio is suitably changed in at least one of a case wherethe vehicle speed of the human-powered vehicle is less than or equal tothe sixth speed, and a case where the rotational speed of the crank axleof the human-powered vehicle is less than or equal to the thirdrotational speed.

A control device in accordance with a thirty-fourth aspect of thepresent disclosure is for a human-powered vehicle. The human-poweredvehicle includes a crank axle, a first rotational body connected to thecrank axle, a wheel, a second rotational body connected to the wheel, atransmission body engaged with the first rotational body and the secondrotational body and configured to transmit driving force between thefirst rotational body and the second rotational body, a derailleurconfigured to operate the transmission body to change a transmissionratio of a rotational speed of the wheel to a rotational speed of thecrank axle, a motor configured to drive the transmission body, and anelectric actuator configured to operate the derailleur. The controldevice comprises an electronic controller configured to control theelectric actuator and the motor. The electronic controller is configuredto be switchable between a first shifting mode, in which the electroniccontroller controls the electric actuator in accordance with a state ofthe human-powered vehicle, and a second shifting mode, in which theelectronic controller controls the electric actuator in accordance withoperation of a transmission operating device provided on thehuman-powered vehicle. The electronic controller is configured to beswitchable between a third mode and a fourth mode in the first shiftingmode. In the third mode, the electronic controller is configured tocontrol the motor and drive the transmission body in accordance with thestate of the human-powered vehicle upon determining the derailleur hasbeen actuated to change the transmission ratio and a predeterminedcondition related to pedaling is satisfied. In the fourth mode, theelectronic controller is configured to control the motor so as not todrive the transmission body even upon determining the derailleur hasbeen actuated to change the transmission ratio and the predeterminedcondition related to pedaling is satisfied. The control device inaccordance with the thirty-fourth aspect is configured to control themotor and drive the transmission body with the motor in a case where thederailleur is actuated to change the transmission ratio and thepredetermined condition related to pedaling is satisfied. This changesthe transmission ratio in a preferred manner. The control device inaccordance with the thirty-fourth aspect allows the user in the firstshifting mode to switch between the third mode in which the transmissionbody is automatically driven and the fourth mode in which thetransmission body is driven by the user.

A control device in accordance with a thirty-fifth aspect of the presentdisclosure is for a human-powered vehicle. The human-powered vehicleincludes a crank axle, a first rotational body connected to the crankaxle, a wheel, a second rotational body connected to the wheel, atransmission body engaged with the first rotational body and the secondrotational body and configured to transmit driving force between thefirst rotational body and the second rotational body, a derailleurconfigured to operate the transmission body to change a transmissionratio of a rotational speed of the wheel to a rotational speed of thecrank axle, an electric actuator configured to operate the derailleur,and a motor configured to drive the transmission body. The controldevice comprises an electronic controller configured to control theelectric actuator and the motor so that a first rotational speedcalculated in correspondence with the rotational speed of the wheel andthe transmission ratio is included in a predetermined range. Theelectronic controller is configured to drive the transmission body withthe motor upon determining the derailleur has been actuated to changethe transmission ratio and a predetermined condition related to pedalingis satisfied. The electronic controller is configured to control theelectric actuator so that among a plurality of shift stages of thederailleur, the transmission ratio is set to be in the largest shiftstage upon determining the first rotational speed is included in thepredetermined range. The control device in accordance with thethirty-fifth aspect is configured to control the motor and drive thetransmission body with the motor in a case where the derailleur isactuated to change the transmission ratio and the predeterminedcondition related to pedaling is satisfied. This changes thetransmission ratio in a preferred manner. The control device inaccordance with the thirty-fifth aspect controls the electric actuatorso that among a plurality of shift stages of the derailleur, thetransmission ratio is set to be in the largest shift stage in a casewhere the first rotational speed is included in the predetermined range.The control device in accordance with the thirty-fifth aspect optimallychanges the shift stage in accordance with the vehicle speed of thehuman-powered vehicle.

In accordance with a thirty-sixth aspect of the present disclosure, inthe control device according to any one of the twenty-sixth tothirty-fifth aspects, the electronic controller is configured to controlthe motor and drive the transmission body with the motor upondetermining the derailleur has been actuated to change the transmissionratio and the predetermined condition related to pedaling is satisfied.The electronic controller is configured to control the electric actuatorso that the transmission ratio does not increase upon determining avehicle speed of the human-powered vehicle is greater than or equal to asecond speed or the rotational speed of the wheel is greater than orequal to a predetermined rotational speed. The control device inaccordance with the thirty-sixth aspect restricts an increase in thetransmission ratio in a case where the vehicle speed of thehuman-powered vehicle is greater than or equal to the second speed orthe rotational speed of the wheel is greater than or equal to thepredetermined rotational speed. The control device in accordance withthe thirty-sixth aspect limits excessive increases in the vehicle speedof the human-powered vehicle.

A control device in accordance with a thirty-seventh-first aspect of thepresent disclosure is for a human-powered vehicle. The human-poweredvehicle includes a crank axle, a first rotational body connected to thecrank axle, a wheel, a second rotational body connected to the wheel, atransmission body engaged with the first rotational body and the secondrotational body and configured to transmit driving force between thefirst rotational body and the second rotational body, a derailleurconfigured to operate the transmission body to change a transmissionratio of a rotational speed of the wheel to a rotational speed of thecrank axle, an electric actuator configured to operate the derailleur,and a motor configured to drive the transmission body. The controldevice comprises an electronic controller configured to control theelectric actuator and the motor. The electronic controller is configuredto control the motor and drive the transmission body with the motor upondetermining the derailleur has been actuated to change the transmissionratio and a predetermined condition related to pedaling is satisfied.The electronic controller is configured to control the electric actuatorso that the transmission ratio does not increase upon determining avehicle speed of the human-powered vehicle is greater than or equal to asecond speed or the rotational speed of the wheel is greater than orequal to a predetermined rotational speed. The control device inaccordance with the thirty-seventh aspect is configured to control themotor and drive the transmission body with the motor in a case where thederailleur is actuated to change the transmission ratio and thepredetermined condition related to pedaling is satisfied. This changesthe transmission ratio in a preferred manner. The control device inaccordance with the thirty-seventh aspect restricts an increase in thetransmission ratio in a case where the vehicle speed of thehuman-powered vehicle is greater than or equal to the second speed orthe rotational speed of the wheel is greater than or equal to thepredetermined rotational speed. The control device in accordance withthe thirty-seventh aspect limits excessive increases in the vehiclespeed of the human-powered vehicle.

In accordance with a thirty-eighth aspect of the present disclosure, inthe control device according to any one of the thirty-fifth tothirty-seventh aspects, the electronic controller is configured tocontrol the electric actuator so as not to change the transmission ratiountil a first condition related to shifting is satisfied upondetermining the derailleur has been actuated. The control device inaccordance with the thirty-eighth aspect controls the electric actuatorso as not to change the transmission ratio until the first conditionrelated to shifting is satisfied in a case where the derailleur isactuated. The control device in accordance with the thirty-eighth aspectrestricts continuous actuation of the derailleur.

A control device in accordance with a thirty-ninth aspect of the presentdisclosure is for a human-powered vehicle. The human-powered vehicleincludes a crank axle, a first rotational body connected to the crankaxle, a wheel, a second rotational body connected to the wheel, atransmission body engaged with the first rotational body and the secondrotational body and configured to transmit driving force between thefirst rotational body and the second rotational body, a derailleurconfigured to operate the transmission body to change a transmissionratio of a rotational speed of the wheel to a rotational speed of thecrank axle, an electric actuator configured to actuate the derailleur,and a motor configured to drive the transmission body. The controldevice comprises an electronic controller configured to control themotor and the electric actuator. The electronic controller is configuredto control the motor and drive the transmission body upon determiningthe derailleur has been actuated with the electric actuator to changethe transmission ratio and a predetermined condition related to pedalingis satisfied. The electronic controller is configured to control theelectric actuator so as not to change the transmission ratio until afirst condition related to shifting is satisfied upon determining thederailleur has been actuated. The control device in accordance with thethirty-ninth aspect is configured to control the motor and drive thetransmission body with the motor in a case where the derailleur isactuated to change the transmission ratio and the predeterminedcondition related to pedaling is satisfied. This changes thetransmission ratio in a preferred manner. The control device inaccordance with the thirty-ninth aspect controls the electric actuatorso as not to change the transmission ratio until the first conditionrelated to shifting is satisfied in a case where the vehicle speed ofthe human-powered vehicle is greater than or equal to the second speedor the rotational speed of the wheel is greater than or equal to thepredetermined rotational speed. The control device in accordance withthe thirty-ninth aspect restricts continuous actuation of the derailleurin a case where the vehicle speed of the human-powered vehicle isgreater than or equal to the second speed or the rotational speed of thewheel is greater than or equal to the predetermined rotational speed.

In accordance with a fortieth aspect of the present disclosure, thecontrol device according to the thirty-eighth or thirty-ninth aspect isconfigured so that the human-powered vehicle further includes a secondoperating device configured to operate the derailleur. The firstcondition related to shifting is satisfied in at least one of a casewhere a predetermined first time elapses from a time of operating thesecond operating device, a case where a predetermined second timeelapses from a time of stopping the electric actuator, a case where aninclination angle of the human-powered vehicle becomes greater than orequal to a first angle, and a case where a vehicle speed of thehuman-powered vehicle becomes greater than or equal to a predeterminedthird speed. The control device in accordance with the fortieth aspectcontrols the electric actuator so as not to change the transmissionratio in at least one of a case where the predetermined first timeelapses from the time of operating the second operating device, a casewhere the predetermined second time elapses from the time of stoppingthe electric actuator, a case where the inclination angle of thehuman-powered vehicle becomes greater than or equal to the first angle,and a case where the vehicle speed of the human-powered vehicle becomesgreater than or equal to the predetermined third speed.

In accordance with a forty-first aspect of the present disclosure, inthe control device according to any one of the twenty-sixth tothirty-ninth aspects, the electronic controller is configured to controlthe electric actuator so as not to change the transmission ratio withthe derailleur until a second condition related to shifting is satisfiedupon determining the electric actuator and the motor are controlled toincrease or decrease the transmission ratio a predetermined number oftimes or more within a predetermined third time. The control device inaccordance with the forty-first aspect controls the electric actuator soas not to change the transmission ratio with the derailleur until thesecond condition related to shifting is satisfied in a case where theelectric actuator and the motor are controlled to increase or decreasethe transmission ratio a predetermined number of times or more withinthe predetermined third time. The control device in accordance with theforty-first aspect reduces frequent changes in the transmission ratio.

A control device in accordance with a forty-second aspect of the presentdisclosure is for a human-powered vehicle. The human-powered vehicleincludes a crank axle, a first rotational body connected to the crankaxle, a wheel, a second rotational body connected to the wheel, atransmission body engaged with the first rotational body and the secondrotational body and configured to transmit driving force between thefirst rotational body and the second rotational body, a derailleurconfigured to operate the transmission body to change a transmissionratio of a rotational speed of the wheel to a rotational speed of thecrank axle, an electric actuator configured to actuate the derailleur,and a motor that drives the transmission body. The control devicecomprises an electronic controller configured to control the electricactuator and the motor. The electronic controller is configured tocontrol the motor and drive the transmission body upon determining thederailleur has been actuated with the electric actuator to change thetransmission ratio and a predetermined condition related to pedaling issatisfied. The electronic controller is configured to control theelectric actuator so as not to change the transmission ratio with thederailleur until a second condition related to shifting is satisfiedupon determining the electric actuator and the motor are controlled toincrease or decrease the transmission ratio a predetermined number oftimes or more within a predetermined third time. The control device inaccordance with the forty-second aspect is configured to control themotor and drive the transmission body with the motor in a case where thederailleur is actuated to change the transmission ratio and thepredetermined condition related to pedaling is satisfied. This changesthe transmission ratio in a preferred manner. The control device inaccordance with the forty-second aspect controls the electric actuatorso as not to change the transmission ratio with the derailleur until thesecond condition related to shifting is satisfied in a case where theelectric actuator and the motor are controlled to increase or decreasethe transmission ratio a predetermined number of times or more withinthe predetermined third time. The control device in accordance with theforty-second aspect reduces frequent changes in the transmission ratio.

In accordance with a forty-third aspect of the present disclosure, thecontrol device according to the forty-first or forty-second aspect isconfigured so that the second condition related to shifting is satisfiedin at least one of a case where a predetermined fourth time elapses froma time of stopping the electric actuator, a case where an inclinationangle of the human-powered vehicle becomes greater than or equal to asecond angle, and a case where a vehicle speed of the human-poweredvehicle becomes greater than or equal to a predetermined fourth speed.The control device in accordance with the forty-third aspect controlsthe electric actuator so as not to change the transmission ratio withthe derailleur until at least one of a case where the predeterminedfourth time elapses from the time of stopping the electric actuator, acase where the inclination angle of the human-powered vehicle becomesgreater than or equal to the second angle, and a case where the vehiclespeed of the human-powered vehicle becomes greater than or equal to thepredetermined fourth speed is satisfied.

A control device in accordance with a forty-fourth aspect of the presentdisclosure is for a human-powered vehicle. The human-powered vehicleincludes a crank axle, a first rotational body connected to the crankaxle, a wheel, a second rotational body connected to the wheel, atransmission body engaged with the first rotational body and the secondrotational body and configured to transmit driving force between thefirst rotational body and the second rotational body, a derailleurconfigured to operate the transmission body to change a transmissionratio of a rotational speed of the wheel to a rotational speed of thecrank axle, an electric actuator configured to actuate the derailleur,and a motor configured to drive the transmission body. The controldevice comprises an electronic controller configured to control theelectric actuator and the motor. The electronic controller is configuredto control the electric actuator and the motor so that relative movementof the derailleur and at least one of the first rotational body and thesecond rotational body is started simultaneously as the motor is drivenor before the motor is driven upon determining the electric actuator andthe motor are controlled to change the transmission ratio and apredetermined condition related to pedaling is satisfied. The controldevice in accordance with the forty-fourth aspect is configured tocontrol the motor and drive the transmission body with the motor in acase where the derailleur is actuated to change the transmission ratioand the predetermined condition related to pedaling is satisfied. Thischanges the transmission ratio in a preferred manner. The control devicein accordance with the forty-fourth aspect controls the motor and theelectric actuator so that relative movement of the derailleur and atleast one of the first rotational body and the second rotational body isstarted simultaneously as the motor is driven or before the motor isdriven. This changes the transmission ratio in a preferred manner.

In accordance with a forty-fifth aspect of the present disclosure, inthe control device according to the forty-fourth aspect, the electroniccontroller is configured to receive a signal for adjusting a position ofthe derailleur. The electronic controller is configured to drive themotor in a case where the signal is received. The electronic controlleris configured to control the electric actuator so that the position ofthe derailleur corresponds to the first transmission ratio upondetermining a first transmission ratio corresponding to a rotationalspeed of the motor and a rotational speed of the wheel does notcorrespond to the present position of the derailleur. The control devicein accordance with the forty-fifth aspect drives the motor in a casewhere the signal for adjusting the position of the derailleur isreceived and the first transmission ratio corresponding to therotational speed of the motor and the rotational speed of the wheel doesnot correspond to the present position of the derailleur. This changesthe transmission ratio in a preferred manner.

A control device in accordance with a forty-sixth aspect of the presentdisclosure is for a human-powered vehicle. The human-powered vehicleincludes a crank axle, a first rotational body connected to the crankaxle, a wheel, a second rotational body connected to the wheel, atransmission body engaged with the first rotational body and the secondrotational body and configured to transmit driving force between thefirst rotational body and the second rotational body, a derailleurconfigured to operate the transmission body to change a transmissionratio of a rotational speed of the wheel to a rotational speed of thecrank axle, a motor configured to drive the transmission body, and anelectric actuator configured to operate the derailleur. The controldevice comprises an electronic controller configured to control theelectric actuator and the motor. The electronic controller is configuredto control the motor and drive the transmission body with the motor upondetermining the derailleur has been actuated to change the transmissionratio and a predetermined condition related to pedaling is satisfied.The electronic controller is configured to control the electric actuatorso that a shift stage of the derailleur approaches a predetermined shiftstage or the transmission ratio approaches a predetermined transmissionratio upon determining the human-powered vehicle has decelerated. Theelectronic controller is configured to control the electric actuator andchange the shift stage of the derailleur one stage at a time upondetermining a difference of the predetermined shift stage and a presentshift stage of the derailleur or a difference of the predeterminedtransmission ratio and the present transmission ratio is less than orequal to a predetermined value. The electronic controller is configuredto control the electric actuator so as to continuously actuate thederailleur over a plurality of shift stages upon determining adifference of the predetermined shift stage and a present shift stage ofthe derailleur or a difference of the predetermined transmission ratioand the present transmission ratio exceeds the predetermined value. Thecontrol device in accordance with the forty-sixth aspect is configuredto control the motor and drive the transmission body with the motor in acase where the derailleur is actuated to change the transmission ratioand the predetermined condition related to pedaling is satisfied. Thischanges the transmission ratio in a preferred manner. The control devicein accordance with the forty-sixth aspect controls the electric actuatorso as to continuously actuate the derailleur over a plurality of shiftstages in a case where the human-powered vehicle is decelerated and thedifference of the predetermined shift stage and the present shift stageof the derailleur or the difference of the predetermined transmissionratio and the present transmission ratio exceeds the predeterminedvalue. The control device in accordance with the forty-sixth aspectreduces the time for changing the present shift stage to a preferredshift stage or the time for changing the present transmission ratio to apreferred transmission ratio.

In accordance with a forty-seventh aspect of the present disclosure, inthe control device according to any one of the twenty-sixth toforty-sixth aspects, the electronic controller is configured to controlthe motor and drive the transmission body with the motor upondetermining the derailleur has been actuated to change the transmissionratio and the predetermined condition related to pedaling is satisfied.The electronic controller is configured to control the electric actuatorso that a fifth time during which the derailleur is actuated over aplurality of shift stages in a case where a vehicle speed of thehuman-powered vehicle is less than or equal to a fifth speed becomesshorter than a sixth time during which the derailleur is actuated overthe plurality of shift stages in a case where the vehicle speed of thehuman-powered vehicle exceeds the predetermined fifth speed. The controldevice in accordance with the forty-seventh aspect controls the electricactuator so that in a case where the derailleur is actuated over aplurality of shift stages and the vehicle speed of the human-poweredvehicle is less than or equal to the fifth speed, actuation of thederailleur is completed in a shorter time than in a case where thevehicle speed of the human-powered vehicle exceeds the predeterminedfifth speed. The control device in accordance with the forty-seventhaspect facilitates completion of shifting before the human-poweredvehicle stops.

A control device in accordance with a forty-eighth aspect of the presentdisclosure is for a human-powered vehicle. The human-powered vehicleincludes a crank axle, a first rotational body connected to the crankaxle, a wheel, a second rotational body connected to the wheel, atransmission body engaged with the first rotational body and the secondrotational body and configured to transmit driving force between thefirst rotational body and the second rotational body, a derailleurconfigured to operate the transmission body to change a transmissionratio of a rotational speed of the wheel to a rotational speed of thecrank axle, a motor configured to drive the transmission body, and anelectric actuator configured to operate the derailleur. The controldevice comprises an electronic controller configured to control theelectric actuator and the motor. The electronic controller is configuredto control the motor and drive the transmission body with the motor upondetermining the derailleur has been actuated to change the transmissionratio and a predetermined condition related to pedaling is satisfied.The electronic controller is configured to control the electric actuatorso that a fifth time during which the derailleur is actuated over aplurality of shift stages in a case where a vehicle speed of thehuman-powered vehicle is less than or equal to a fifth speed becomesshorter than a sixth time during which the derailleur is actuated overthe plurality of shift stages in a case where the vehicle speed of thehuman-powered vehicle exceeds the predetermined fifth speed. The controldevice in accordance with the forty-eighth aspect is configured tocontrol the motor and drive the transmission body with the motor in acase where the derailleur is actuated to change the transmission ratioand the predetermined condition related to pedaling is satisfied. Thischanges the transmission ratio in a preferred manner. The control devicein accordance with the forty-eighth aspect controls the electricactuator so that in a case where the derailleur is actuated over aplurality of shift stages and the vehicle speed of the human-poweredvehicle is less than or equal to the fifth speed, actuation of thederailleur is completed in a shorter time than in a case where thevehicle speed of the human-powered vehicle exceeds the predeterminedfifth speed. The control device in accordance with the forty-eighthaspect facilitates completion of shifting before the human-poweredvehicle stops.

A control device in accordance with a forty-ninth aspect of the presentdisclosure is for a human-powered vehicle. The human-powered vehicleincludes a crank axle, a first rotational body connected to the crankaxle, a wheel, a second rotational body connected to the wheel, atransmission body engaged with the first rotational body and the secondrotational body and configured to transmit driving force between thefirst rotational body and the second rotational body, a derailleurconfigured to operate the transmission body to change a transmissionratio of a rotational speed of the wheel to a rotational speed of thecrank axle and including a plurality of shift positions, an electricactuator configured to actuate the derailleur, and a motor configured todrive the transmission body. The control device comprises an electroniccontroller configured to control the electric actuator and the motor andreceive a signal for adjusting the position of the derailleur. Theelectronic controller is configured to control the motor so as to drivethe motor in a case where the signal is received. The electroniccontroller is configured to control the electric actuator so that aposition of the derailleur corresponds to a first transmission ratiocorresponding to a rotational speed of the motor and the rotationalspeed of the wheel upon determining the first transmission ratio doesnot correspond to a present position of the derailleur. The controldevice in accordance with the forty-ninth aspect drives the motor in acase where a signal for adjusting the position of the derailleur isreceived, and drives the derailleur with the electric actuator so thatin a case where the first transmission ratio corresponding to therotational speed of the motor and the rotational speed of the wheel doesnot correspond to the present position of the derailleur, the presentposition of the derailleur corresponds to correspond to the firsttransmission ratio.

In accordance with a fiftieth aspect of the present disclosure, thecontrol device according to the forty-ninth aspect further comprises apower storage device configured to store electric power generated by themotor. The electronic controller is configured to control the motor withthe electric power of the power storage device. The power transmissionsystem in accordance with the forty-ninth aspect controls the motorusing electric power of the power storage device configured to storeelectric power generated by the motor. The power transmission system inaccordance with the fiftieth aspect reduces the frequency of chargingthe power storage device.

A power transmission system in accordance with a fifty-first aspect ofthe present disclosure is for a human-powered vehicle. The human-poweredvehicle includes a crank axle, a first rotational body connected to thecrank axle, a wheel, a second rotational body connected to the wheel, atransmission body engaged with the first rotational body and the secondrotational body and configured to transmit driving force between thefirst rotational body and the second rotational body, and a derailleurconfigured to operate the transmission body to change a transmissionratio of a rotational speed of the wheel to a rotational speed of thecrank axle. The power transmission system comprises a motor configuredto drive the transmission body and generate electric power by beingdriven by the transmission body, a power storage device configured tostore the electric power generated by the motor, and a control devicefor the human-powered vehicle, wherein the control device includes anelectronic controller configured to control the motor with the electricpower of the power storage device, and the electronic controller isconfigured to control the motor and drive the transmission body upondetermining the derailleur has been actuated to change the transmissionratio and a predetermined condition related to pedaling is satisfied.The power transmission system in accordance with the fifty-first aspectis configured to control the motor and drive the transmission body withthe motor in a case where the derailleur is actuated to change thetransmission ratio and the predetermined condition related to pedalingis satisfied. This changes the transmission ratio in a preferred manner.The power transmission system in accordance with the fiftieth aspectcontrols the motor using electric power of the power storage deviceconfigured to store electric power generated by the motor. The powertransmission system in accordance with the fifty-first aspect reducesthe frequency of charging the power storage device.

In accordance with a fifty-second aspect of the present disclosure, thepower transmission system according to the fifty-first aspect isconfigured so that the human-powered vehicle further includes anelectric actuator configured to actuate the derailleur. The electroniccontroller is configured to control the electric actuator with theelectric power of the power storage device. The power transmissionsystem in accordance with the fifty-second aspect controls the electricactuator using electric power of the power storage device configured tostore electric power generated by the motor.

In accordance with a fifty-third aspect of the present disclosure, thepower transmission system according to the fiftieth or fifty-firstaspect further comprises a first one-way clutch provided in a firstpower transmission path between the crank axle and the first rotationalbody and configured to transmit rotational force from the crank axle tothe first rotational body in a first rotational direction and restricttransmission of rotational force from the first rotational body to thecrank axle in the first rotational direction. The power transmissionsystem in accordance with the fifty-third aspect restricts transmissionof rotational force of the first rotational body to the crank axle withthe first one-way clutch in a case where the first rotational body isrotated by the motor. This changes the transmission ratio in a preferredmanner in a case where the motor is driven to change the transmissionratio.

The control device for a human-powered vehicle and the powertransmission system of the present disclosure change the transmissionratio in a preferred manner.

BRIEF DESCRIPTION OF THE DRAWINGS

Referring now to the attached drawings which form a part of thisoriginal disclosure.

FIG. 1 is a side elevational view of a human-powered vehicle including acontrol device in accordance with a first embodiment.

FIG. 2 is a cross-sectional view of a drive unit included in thehuman-powered vehicle shown in FIG. 1 .

FIG. 3 is a diagram showing a power transmission path of a powertransmission system of the human-powered vehicle shown in FIG. 1 .

FIG. 4 is a block diagram showing the electrical configuration of thehuman-powered vehicle including the control device of the firstembodiment.

FIG. 5 is a flowchart of a process executed by the electronic controllershown in FIG. 4 for controlling an electric actuator and a motor tochange the transmission ratio.

FIG. 6 is a flowchart of a process executed by the electronic controllershown in FIG. 4 for controlling the electric actuator and the motor toadjust the position of a derailleur.

FIG. 7 is a flowchart of a process executed by an electronic controllerfor switching between a first mode and a second mode in accordance witha second embodiment.

FIG. 8 is a flowchart of a process executed by the electronic controllerof the second embodiment for controlling the electric actuator and themotor to change the transmission ratio.

FIG. 9 is a block diagram showing the electrical configuration of acontrol device in accordance with a third embodiment.

FIG. 10 is a flowchart of a process executed by the electroniccontroller shown in FIG. 9 for controlling the electric actuator and themotor to change the transmission ratio.

FIG. 11 is a block diagram showing the electrical configuration of thehuman-powered vehicle including the control device of the thirdembodiment.

FIG. 12 is a flowchart of a process executed by the electroniccontroller shown in FIG. 11 for switching between a third mode and afourth mode in a first shifting mode.

FIG. 13 is a flowchart of a process executed by a first modification ofan electronic controller for controlling the electric actuator and themotor to change the transmission ratio.

FIG. 14 is a flowchart of a process executed by a second modification ofan electronic controller for controlling an electric actuator and amotor to change the transmission ratio.

FIG. 15 is a flowchart of a process executed by a third modification ofan electronic controller for controlling an electric actuator and amotor to change the transmission ratio.

FIG. 16 is a flowchart of a process executed by a fourth modification ofan electronic controller for controlling an electric actuator and amotor to change the transmission ratio.

FIG. 17 is a flowchart of a process executed by a fifth modification ofan electronic controller for controlling an electric actuator and amotor to change the transmission ratio.

FIG. 18 is a flowchart of a process executed by a sixth modification ofan electronic controller for controlling an electric actuator and amotor to change the transmission ratio.

FIG. 19 is a flowchart of a process executed by a seventh modificationof an electronic controller for controlling an electric actuator and amotor to change the transmission ratio.

FIG. 20 is a flowchart of a process executed by an eighth modificationof an electronic controller for controlling an electric actuator and amotor to change the transmission ratio.

FIG. 21 is a flowchart of a process executed by a ninth modification ofan electronic controller for controlling an electric actuator and amotor to change the transmission ratio.

FIG. 22 is a flowchart of a process executed by a tenth modification ofan electronic controller for controlling an electric actuator and amotor to change the transmission ratio.

FIG. 23 is a flowchart of a process executed by an eleventh modificationof an electronic controller for controlling an electric actuator and amotor to change the transmission ratio.

FIG. 24 is a flowchart of a process executed by a twelfth modificationof an electronic controller for controlling an electric actuator and amotor to change the transmission ratio.

FIG. 25 is a flowchart of a process executed by a thirteenthmodification of an electronic controller for controlling an electricactuator and a motor to change the transmission ratio.

FIG. 26 is a flowchart of a process executed by a fourteenthmodification of an electronic controller for controlling an electricactuator and a motor to change the transmission ratio.

FIG. 27 is a flowchart of a process executed by a fifteenth modificationof an electronic controller for controlling an electric actuator and amotor to change the transmission ratio.

FIG. 28 is a flowchart of a process executed by a sixteenth modificationof an electronic controller for controlling an electric actuator and amotor to change the transmission ratio.

DETAILED DESCRIPTION OF EMBODIMENTS

Selected embodiments will now be explained with reference to thedrawings. It will be apparent to those skilled in the human-poweredvehicle field from this disclosure that the following descriptions ofthe embodiments are provided for illustration only and not for thepurpose of limiting the invention as defined by the appended claims andtheir equivalents.

First Embodiment

A first embodiment of a power transmission system 60 for a human-poweredvehicle and a control device 70 for a human-powered vehicle will now bedescribed with reference to FIGS. 1 to 6 . A human-powered vehicle 10 isa vehicle including at least one wheel and driven by at least the humandriving force H. The human-powered vehicle 10 includes, for example,various types of bicycles such as a mountain bike, a road bike, a citybike, a cargo bike, a hand bike, and a recumbent bike. The number ofwheels on the human-powered vehicle 10 is not limited. The human-poweredvehicle 10 includes, for example, a monocycle and a vehicle includingthree or more wheels. The human-powered vehicle 10 is not limited to avehicle configured to be driven only by human driving force H. Thehuman-powered vehicle 10 includes an E-bike that uses driving force of amotor in addition to the human driving force H for propulsion. TheE-bike includes an electric assist bicycle that assists in propulsionwith a motor. In the embodiments described below, the human-poweredvehicle 10 refers to an electric assist bicycle.

The human-powered vehicle 10 includes a crank axle 12, a firstrotational body 14, a wheel 16, a second rotational body 18, atransmission body 20, a derailleur 22, and a motor 24. The human-poweredvehicle 10 further includes two crank arms 26. The crank axle 12 and thecrank arms 26 form a crank 28. A human driving force H is input to thecrank 28. The human-powered vehicle 10 further includes a vehicle body30. The wheel 16 includes a rear wheel 16A and a front wheel 16B. Thevehicle body 30 includes a frame 32. The crank 28 is rotatable relativeto the frame 32. The crank arms 26 include a first crank arm 26A and asecond crank arm 26B. The first crank arm 26A is provided on one axialend of the crank axle 12. The second crank arm 26B is provided on theother axial end of the crank axle 12. The human-powered vehicle 10includes pedals 34. The pedals 34 include a first pedal 34A and a secondpedal 34B. The first pedal 34A is coupled to the first crank arm 26A.The second pedal 34B is coupled to the second crank arm 26B. The rearwheel 16A is driven in accordance with rotation of the crank 28. Therear wheel 16A is supported by the frame 32. The crank 28 and the rearwheel 16A are coupled by a drive mechanism 36.

The drive mechanism 36 includes the first rotational body 14, the secondrotational body 18, and the transmission body 20. The first rotationalbody 14 is connected to the crank axle 12. The second rotational body 18is connected to the wheel 16. The transmission body 20 is engaged withthe first rotational body 14 and the second rotational body 18 and isconfigured to transmit driving force between the first rotational body14 and the second rotational body 18. The transmission body 20 transmitsrotational force of the first rotational body 14 to the secondrotational body 18. In the present embodiment, the first rotational body14 is coaxial with the crank axle 12. However, the first rotational body14 can be configured not to be coaxial with the crank axle 12. In a casewhere the first rotational body 14 is not coaxial with the crank axle12, the first rotational body 14 and the crank axle 12 are connected bya first transmission mechanism including at least one of a gear, apulley, a chain, a shaft, and a belt. In the present embodiment, thesecond rotational body 18 is coaxial with the rear wheel 16A. However,the second rotational body 18 can be configured not to be coaxial withthe rear wheel 16A. In a case where the second rotational body 18 is notcoaxial with the rear wheel 16A, the second rotational body 18 and therear wheel 16A are connected by a second transmission mechanismincluding at least one of a gear, a pulley, a chain, a shaft, and abelt.

The front wheel 16B is attached to the frame 32 by a front fork 38. Thefront fork 38 is coupled to a handlebar 42 by a stem 40. In the presentembodiment, the rear wheel 16A is coupled to the crank 28 by the drivemechanism 36. However, at least one of the rear wheel 16A and the frontwheel 16B can be coupled to the crank 28 by the drive mechanism 36.

The derailleur 22 is configured to operate the transmission body 20 tochange a transmission ratio R of rotational speed NW of the wheel 16 torotational speed NC of the crank axle 12. The relation of thetransmission ratio R, the rotational speed NW, and the rotational speedNC is expressed by equation (1).

Transmission Ratio R=Rotational Speed NW/Rotational Speed NC  Equation(1):

The derailleur 22 includes, for example, at least one of a frontderailleur and a rear derailleur. In a case where the derailleur 22includes a rear derailleur, the first rotational body 14 includes atleast one sprocket, the second rotational body 18 include multiplesprockets, and the transmission body 20 includes a chain. In a casewhere the derailleur 22 includes a rear derailleur, the derailleur 22moves the chain from one of the sprockets of the second rotational body18 to another one of the sprockets that is engaged with the chain. In acase where the derailleur 22 includes a front derailleur, the firstrotational body 14 includes multiple sprockets, the second rotationalbody 18 includes at least one sprocket, and the transmission body 20includes a chain. In a case where the derailleur 22 includes a frontderailleur, the derailleur 22 moves the chain from one of the sprocketsof the first rotational body 14 to another one of the sprockets that isengaged with the chain. The derailleur 22 operates the transmission body20 to change the transmission ratio R by changing the engagement stateof the transmission body 20 with at least one of the first rotationalbody 14 and the second rotational body 18.

The first rotational body 14 and the second rotational body 18 can beprovided on a gear box. The gear box is, for example, provided in thevicinity of the crank axle 12. In a case where the first rotational body14 and the second rotational body 18 are provided on the gear box, atleast one of the first rotational body 14 and the second rotational body18 includes multiple sprockets, and the derailleur 22 is provided on thegear box and is configured to change the engagement state of thetransmission body 20 with at least one of the first rotational body 14and the second rotational body 18.

Preferably, the human-powered vehicle 10 further includes a firstoperating device 44. The first operating device 44 is provided, forexample, on the handlebar 42. The first operating device 44 isconfigured to be operated by a hand or a finger of a user or the like.The first operating device 44 includes a first operating portion 44A.The first operating device 44 is operated by the user to intentionallyprohibit shifting. Preferably, the human-powered vehicle 10 furtherincludes a second operating device 45 configured to operate thederailleur 22. The second operating device 45 is, for example, providedon the handlebar 42. The second operating device 45 is configured to beoperated by a hand or a finger of the user of the like. The secondoperating device 45 includes at least a second operating portion 45A anda third operating portion 45B.

Part of the first operating device 44 and part of the second operatingdevice 45 can be formed integrally with each other as a one-piecemember. For example, the first operating portion 44A of the firstoperating device 44 and the second operating portion 45A and the thirdoperating portion 45B of the second operating device 45 can be providedon the same base member. The first operating portion 44A includes, forexample, a button switch or a lever switch. The first operating portion44A is not limited to a button switch or a lever switch and can have anyconfiguration that changes between at least two states in accordancewith operation of the user. The second operating portion 45A and thethird operating portion 45B include, for example, a button switch or alever switch. The second operating portion 45A and the third operatingportion 45B are not limited to a button switch or a lever switch and canhave any configuration that changes between at least two states inaccordance with operation of the user.

The second operating portion 45A and the third operating portion 45B areconfigured to operate the derailleur 22. The second operating device 45outputs a shifting operation signal to an electronic controller 72 ofthe control device 70 in accordance with operation of the user. Inaddition to or instead of the second operating portion 45A and the thirdoperating portion 45B, the second operating device 45 can include afourth operating portion 45C configured to operate a human-poweredvehicle component that excludes the derailleur 22. The human-poweredvehicle component includes, for example, at least one of a cyclecomputer, a suspension, an adjustable seatpost, a lamp, and a driveunit. The shifting operation signal includes, for example, a firstoperation signal including an instruction to operate the derailleur 22to increase the transmission ratio R and a second operation signalincluding an instruction to operate the derailleur 22 to decrease thetransmission ratio R.

The second operating device 45 outputs the first operation signal in acase where the second operating portion 45A is operated, and outputs thesecond operation signal in a case where the third operating portion 45Bis operated. In the present embodiment, the rear derailleur is operatedby the second operating portion 45A and the third operating portion 45B.However, the front derailleur can be operated by the second operatingportion 45A and the third operating portion 45B. Both the frontderailleur and the rear derailleur can be operated by the secondoperating portion 45A and the third operating portion 45B. In additionto the second operating portion 45A and the third operating portion 45B,the second operating device 45 can further include a fifth operatingportion and a sixth operating portion. The fifth operating portion andthe sixth operating portion are, for example, configured in the samemanner as the second operating portion 45A and the third operatingportion 45B. The rear derailleur can be operated by one of the set ofthe second operating portion 45A and the third operating portion 45B andthe set of the fifth operating portion and the sixth operating portion,and the front derailleur can be operated by the other one of the set ofthe second operating portion 45A and the third operating portion 45B andthe set of the fifth operating portion and the sixth operating portion.

Preferably, the human-powered vehicle 10 further includes an electricactuator 48 that is configured to operate the derailleur 22. Theelectric actuator 48 includes, for example, an electric motor. Theelectric actuator 48 can further include, for example, a speed reducercoupled to an output shaft of the electric motor. The electric actuator48 can be provided on the derailleur 22 or can be provided on thehuman-powered vehicle 10 at a position separate from the derailleur 22.The electric actuator 48 is driven so that the derailleur 22 operatesthe transmission body 20 to perform a shifting action. The derailleur 22includes, for example, a base member, a movable member, and a linkmember that movably couples the movable member to the base member. Themovable member includes a guide member that guides a coupling member.The guide member includes, for example, a guide plate and a pulley. Theelectric actuator 48 can, for example, directly drive the link member.The electric actuator 48 can drive the link member using a cable.

Preferably, the human-powered vehicle 10 further includes a battery 46.The battery 46 includes one or more battery elements. The batteryelements include a rechargeable battery. The battery 46 is configured tosupply electric power to the control device 70. Preferably, the battery46 is also configured to supply electric power to the electric actuator48. Preferably, the battery 46 is connected to the controller 72 of thecontrol device 70 so that wired or wireless communication is performed.The battery 46 is configured to communicate with the controller 72through, for example, power line communication (PLC), a controller areanetwork (CAN), or a universal asynchronous receiver/transmitter (UART).

The motor 24 is configured to drive the transmission body 20.Preferably, the motor 24 is configured to apply a propulsion force tothe human-powered vehicle 10 in accordance with the human driving forceH. The motor 24 includes one or more electric motors. The electric motorof the motor 24 is, for example, a brushless motor. The motor 24 isconfigured to transmit rotational force to a power transmission path ofthe human driving force H extending from the pedals 34 to the secondrotational body 18. In the present embodiment, the motor 24 is providedon the frame 32 of the human-powered vehicle 10, and is configured totransmit rotational force to the first rotational body 14. Thehuman-powered vehicle 10 further includes a housing 52 on which themotor 24 is provided. A drive unit 50 is configured to include the motor24 and the housing 52. The housing 52 is attached to the frame 32. Thehousing 52 rotationally supports the crank axle 12. The motor 24 can beconfigured to transmit rotational force to the transmission body 20, forexample, without using the first rotational body 14. In this case, forexample, a sprocket configured to engage with the transmission body 20is provided on the output shaft of the motor 24 or a transmission memberto which force of the output shaft is transmitted.

A speed reducer 54 can be provided between the motor 24 and the powertransmission path of the human driving force H. The speed reducer 54 is,for example, configured to include gears. Preferably, a third one-wayclutch 56 can be provided between the motor 24 and the powertransmission path of the human driving force H to restrict transmissionof rotational force of the crank 28 to the motor 24 in a case where thecrank axle 12 is rotated in a direction in which the human-poweredvehicle 10 travels forward. The third one-way clutch 56 includes, forexample, at least one of a roller clutch, a sprag-type clutch, and apawl-type clutch.

The drive unit 50 includes an output portion 58. The output portion 58is, for example, coupled to the crank axle 12 and the speed reducer 54.The human driving force H and the output of the motor 24 are input tothe output portion 58. The first rotational body 14 is coupled to theoutput portion 58 so as to rotate integrally with the output portion 58.

Preferably, the power transmission system 60 includes the control device70 and a first one-way clutch 62. The first one-way clutch 62 isprovided in a first power transmission path between the crank axle 12and the first rotational body 14. The first one-way clutch 62 isconfigured to transmit rotational force from the crank axle 12 to thefirst rotational body 14 in a first rotational direction, and restricttransmission of rotational force from the first rotational body 14 tothe crank axle 12 in the first rotational direction. The first one-wayclutch 62 is configured to rotate the first rotational body 14 forwardin a case where the crank 28 rotates forward, and allow relativerotation of the crank 28 and the first rotational body 14 in a casewhere the crank 28 rotates rearward. The first one-way clutch 62 isprovided, for example, on the housing 52 of the drive unit 50. The firstone-way clutch 62 is provided, for example, between the crank axle 12and the output portion 58. The first one-way clutch 62 includes, forexample, at least one of a roller clutch, a sprag-type clutch, and apawl-type clutch.

The crank axle 12 and the first rotational body 14 can be coupled so asto rotate integrally with each other. In a case where the crank axle 12and the first rotational body 14 are coupled so as to rotate integrallywith each other, the first one-way clutch 62 is omitted.

Preferably, the power transmission system 60 further includes a secondone-way clutch 64. The second one-way clutch 64 is provided in a secondpower transmission path between the second rotational body 18 and thewheel 16. The second one-way clutch 64 is configured to transmitrotational force from the second rotational body 18 to the wheel 16 in asecond rotational direction corresponding to the first rotationaldirection, and restrict transmission of rotational force from the wheel16 to the second rotational body 18 in the second rotational direction.The second one-way clutch 64 is configured to rotate the rear wheel 16Aforward in a case where the second rotational body 18 rotates forward,and allow relative rotation of the second rotational body 18 and therear wheel 16A in a case where the second rotational body 18 rotatesrearward. The second one-way clutch 64 is provided, for example, on ahub axle of the rear wheel 16A. The second one-way clutch 64 includes,for example, at least one of a roller clutch, a sprag-type clutch, and apawl-type clutch.

The second rotational body 18 and the rear wheel 16A can be coupled soas to rotate integrally with each other. In a case where the secondrotational body 18 and the rear wheel 16A are coupled so as to rotateintegrally with each other, the second one-way clutch 64 is omitted.

Preferably, the power transmission system 60 further includes a powerstorage device 66. The power storage device 66 is configured to storeelectric power generated by the motor 24. Preferably, the controller 72is configured to control the motor 24 using electric power of the powerstorage device 66. The power storage device 66 can include the battery46, can include a battery different from the battery 46, or can includea capacitor. The power storage device 66 is provided, for example, onthe housing 52 of the drive unit 50.

The control device 70 includes the electronic controller 72. Thecontroller 72 includes at least one processor 72A that executes apredetermined control program. The at least one processor 72A can be forexample, a central processing unit (CPU) or a micro processing unit(MPU). The term “electronic controller” as used herein refers tohardware that executes a software program, and does not include a human.For the sake of brevity, the electronic controller 72 shall hereinafterbe simply referred to as “the controller 72”. The processor 72Aincludes, for example, an arithmetic processing unit. While only oneprocessor is illustrated in FIG. 2 , it will be apparent from thisdisclosure that several processors can be used. When several processorsare used, the processors can be provided at different positions separatefrom each other. The controller 72 can include one or moremicrocomputers. Preferably, the control device 70 further includesstorage 74. The storage 74 stores various control programs andinformation used for various control processes. The storage 74 includesany computer storage device or any non-transitory computer-readablemedium with the sole exception of a transitory, propagating signal. Forexample, the storage 74 includes a nonvolatile memory and a volatilememory. The nonvolatile memory includes, for example, at least one of aread-only memory (ROM), an erasable programmable read only memory(EPROM), an electrically erasable programmable read-only memory(EEPROM), and a flash memory. The volatile memory includes, for example,a random access memory (RAM).

Preferably, the control device 70 further includes a drive circuit 76 ofthe motor 24. Preferably, the drive circuit 76 and the controller 72 areprovided on the housing 52 of the drive unit 50. The drive circuit 76and the controller 72 can be provided, for example, on the same circuitsubstrate. The drive circuit 76 includes an inverter circuit. The drivecircuit 76 controls electric power supplied from the battery 46 to themotor 24. The drive circuit 76 is connected to the controller 72 so thatwired or wireless communication is performed. The drive circuit 76drives the motor 24 in accordance with a control signal from thecontroller 72.

Preferably, the control device 70 further includes a vehicle speedsensor 78, a crank rotation sensor 80, and a torque sensor 82. The term“sensor” as used herein also refers to a hardware device or instrumentdesigned to detect the presence of a particular object or substance andto emit a signal in response. The term “sensor” as used herein also donot include a human.

The vehicle speed sensor 78 is configured to detect informationcorresponding to the rotational speed NW of the wheel 16 of thehuman-powered vehicle 10. Preferably, the vehicle speed sensor 78 isconfigured to detect a magnet provided on the wheel 16 of thehuman-powered vehicle 10. The vehicle speed sensor 78 is configured to,for example, output detection signals a predetermined number of times inone rotation of the wheel 16. The predetermined number of times is, forexample, one. The vehicle speed sensor 78 outputs a signal correspondingto the rotational speed NW of the wheel 16. The controller 72 calculatesa vehicle speed V of the human-powered vehicle 10 based on therotational speed NW of the wheel 16. The vehicle speed V is calculatedbased on the rotational speed NW of the wheel 16 and information relatedto the perimeter of the wheel 16. The information related to theperimeter of the wheel 16 is stored in the storage 74.

The vehicle speed sensor 78 includes, for example, a magnetic reedforming a reed switch or a Hall element. The vehicle speed sensor 78 canbe attached to a chainstay of the frame 32 of the human-powered vehicle10 and configured to detect a magnet attached to the rear wheel 16A orcan be provided on the front fork 38 and configured to detect a magnetattached to the front wheel 16B. In the present embodiment, the vehiclespeed sensor 78 is configured so that the reed switch detects the magnetonce in one rotation of the wheel 16. The vehicle speed sensor 78 canhave any configuration that detects information corresponding to therotational speed NW of the wheel 16 of the human-powered vehicle 10 andcan include, for example, an optical sensor or an acceleration sensor.The vehicle speed sensor 78 is connected to the controller 72 via awireless communication device or an electric cable.

The crank rotation sensor 80 is configured to detect informationcorresponding to the rotational speed NC of the crank axle 12 of thehuman-powered vehicle 10. The crank rotation sensor 80 is provided, forexample, on the frame 32 of the human-powered vehicle 10 or the driveunit 50. The crank rotation sensor 80 is configured to include amagnetic sensor that outputs a signal corresponding to the strength ofthe magnetic field. An annular magnet having a magnetic field, thestrength of which changes in the circumferential direction, is providedon the crank axle 12, a member that rotates in cooperation with thecrank axle 12, or the power transmission path between the crank axle 12and the first rotational body 14. The member that rotates in cooperationwith the crank axle 12 can include the output shaft of the motor 24. Thecrank rotation sensor 80 outputs a signal corresponding to therotational speed NC of the crank axle 12.

The magnet can be provided on a member that rotates integrally with thecrank axle 12 in the power transmission path of the human driving forceH between the crank axle 12 and the first rotational body 14. Forexample, in a case where the first one-way clutch is not providedbetween the crank axle 12 and the first rotational body 14, the magnetcan be provided on the first rotational body 14. The crank rotationsensor 80 can have any configuration that detects informationcorresponding to the rotational speed NC of the crank axle 12 of thehuman-powered vehicle 10 and can include, for example, an opticalsensor, an acceleration sensor, or a torque sensor instead of themagnetic sensor. The crank rotation sensor 80 is connected to thecontroller 72 by a wireless communication device or an electric cable.

The torque sensor 82 is configured to output a signal corresponding totorque applied to the crank 28 by the human driving force H. The torquesensor 82 is configured to output information corresponding to torque ofthe human driving force H that is input to the crank 28. For example, ina case where the first one-way clutch 62 is provided on the powertransmission path, it is preferred that the torque sensor 82 is providedat the upstream side of the first one-way clutch 62 in the powertransmission path. The torque sensor 82 includes, for example, a strainsensor, a magnetostrictive sensor, or a pressure sensor. The strainsensor includes a strain gauge. The torque sensor 82 is provided on amember included in the power transmission path or a member provided nearthe member included in the power transmission path. The member includedin the power transmission path is, for example, the crank axle 12, amember that transmits the human driving force H between the crank axle12 and the first rotational body 14, the crank arms 26, or the pedals34. The torque sensor 82 is connected to the controller 72 by a wirelesscommunication device or an electric cable.

Preferably, the control device 70 includes a first detector 84. The term“detector” as used herein refers to a hardware device or instrumentdesigned to detect the presence of a particular object or substance andto emit a signal in response. The term “detector” as used herein do notinclude a human. The first detector 84 is configured to detect a load Lof the motor 24. The first detector 84 includes a current sensor thatdetects current flowing through the motor 24 and a rotation sensor thatdetects rotational speed of the motor 24. Since a known technique can beused to detect the load L of the motor 24 based on the current flowingthrough the motor 24 and the rotational speed of the motor 24, thetechnique will not be described in detail.

Preferably, the control device 70 further includes a second detector 86that detects an inclination angle D of the human-powered vehicle 10. Theinclination angle D includes a pitch angle of the human-powered vehicle10. The second detector 86 includes, for example, at least one of aninclination sensor and a global positioning system (GPS). Theinclination sensor includes, for example, at least one of a gyro sensorand an acceleration sensor. In a case in which the second detector 86includes a GPS receiver, the storage 74 stores map information includinginformation related to road gradient in advance, and the controller 72obtains the road gradient of the current position of the human-poweredvehicle 10 as the pitch angle.

Preferably, the control device 70 further includes a transmission statesensor 88. The transmission state sensor 88 outputs information relatedto a transmission state of the derailleur 22. The transmission stateincludes, for example, a shift stage. The transmission state sensor 88can be provided on the derailleur 22 or can be provided on the secondoperating device 45. The transmission state sensor 88 is configured to,for example, detect an action of the electric actuator 48. The electricactuator 48 includes, for example, an electric motor and a speedreducer. The transmission state sensor 88 is configured to detect anaction of the electric motor or the speed reducer of the electricactuator 48. The transmission state sensor 88 is configured to include,for example, a magnetic sensor, a potentiometer, a rotary encoder, alinear encoder or an optical sensor.

The storage 74 stores information related to the transmission state thatis output from the transmission state sensor 88 in association withinformation related to the transmission ratio R of the human-poweredvehicle 10. The association of information related to the transmissionstate with information related to the transmission ratio R of thehuman-powered vehicle 10 can be stored as a table or a function. Thecontroller 72 obtains information related to the present transmissionratio R of the human-powered vehicle 10 based on the information relatedto the transmission state output from the transmission state sensor 88and information stored in the storage 74. Information relate to thetransmission ratio R of the human-powered vehicle 10 can be expressed bythe transmission ratio R or can be expressed by a parametercorresponding to the transmission ratio R instead of the transmissionratio R. The parameter corresponding to the transmission ratio R can bea parameter expressing the shift stage.

The controller 72 is configured to control the motor 24. The controller72 is configured to control the motor 24, for example, in accordancewith at least one of the vehicle speed V of the human-powered vehicle10, a rotational speed N of the crank 28, and the human driving force H.The human driving force H can be expressed in torque HT or power HW. Ina case where the human driving force H is expressed in the power HW, thehuman driving force H is obtained by multiplying torque that is detectedby the torque sensor 82 by the rotational speed NC of the crank axle 12detected by the crank rotation sensor 80.

The controller 72 is configured to control the motor 24, for example, sothat the ratio of an assist force M produced by the motor 24 to thehuman driving force H equals a predetermined assist ratio A. Thepredetermined assist ratio A does not have to be constant and can be,for example, change in accordance with the human driving force H, thevehicle speed V, or both the human driving force H and the vehicle speedV. The human driving force H and the assist force M can be expressed intorque or power. In a case where the human driving force H and theassist force M are expressed in torque, the human driving force H isreferred to as human torque TH, and the assist force M is referred to asan assist torque TM. In a case where the human driving force H and theassist force M are expressed in power, the human driving force H isreferred to as a human power WH, and the assist force M is referred toas an assist power WM. In the description, the torque ratio of an outputtorque MT to the human torque TH of the human-powered vehicle 10 can bereferred to as an assist ratio AT. In the description, the ratio of theassist power WM of the motor 24 to the human power WH can be referred toas an assist ratio AW. The assist ratio A is equal to the ratio of apropulsion force generated in the human-powered vehicle 10 by an assistforce of the motor 24 to a propulsion force generated in thehuman-powered vehicle by the human driving force H.

The controller 72 is configured to control the motor 24, for example, ina control state selected from multiple control states that at leastpartially differ from each other in the correspondence relationshipbetween the human driving force H and the ratio A. The human power WH iscalculated by multiplying the human torque TH by the rotational speed NCof the crank axle 12. In a case where the output of the motor 24 isinput to the power transmission path of the human driving force Hthrough the speed reducer 54, the output of the speed reducer 54 is usedas the assist force M. In a case where the speed reducer 54 is notprovided, the assist power WM is calculated by multiplying the outputtorque of the motor 24 by the rotational speed of the motor 24. In acase where the speed reducer 54 is provided, the assist power WM iscalculated by multiplying the output torque of the speed reducer 54 byan output rotational speed of the speed reducer 54. In a case where thespeed reducer 54 is provided, the storage 74 is configured to storeinformation related to a reduction ratio of the speed reducer 54.

The controller 72 calculates the output rotational speed of the speedreducer 54 based on the rotational speed of the motor 24 and informationrelated to the reduction ratio of the speed reducer 54. The storage 74stores, for example, information indicating the relation between acontrol instruction of the motor 24 and the output torque of the motor24. The controller 72 calculates the output torque of the motor 24 inaccordance with, for example, information indicating the relationbetween the control instruction of the motor 24 and the output torque ofthe motor 24 stored in the storage 74. The controller 72 calculates theoutput torque of the speed reducer 54, for example, in accordance withthe output torque of the motor 24 and information related to thereduction ratio of the speed reducer. The controller 72 is configured tooutput the control instruction to the drive circuit 76 of the motor 24in accordance with the human torque TH or the human power WH. Thecontrol instruction includes, for example, a torque instruction value.The control states can include a control state in which the motor 24 isnot driven.

The controller 72 is configured to control the motor 24 so that theassist force M becomes less than or equal to an upper limit value MX. Ina case where the assist force M is expressed in torque, the controller72 is configured to control the motor 24 so that the output torque MTbecomes less than or equal to an upper limit value MTX. Preferably, theupper limit value MTX is in a range that is greater than or equal to 30Nm and less than or equal to 90 Nm. The upper limit value MTX is, forexample, 80 Nm. The upper limit value MTX is determined, for example, byan output property of the motor 24. In a case where the assist force Mis expressed in power, the controller 72 is configured to control themotor 24 so that the assist power WM becomes less than or equal to anupper limit value WMX.

For example, upon determining the vehicle speed V has become greaterthan or equal to a predetermined the vehicle speed VX, the controller 72stops the motor 24. The predetermined vehicle speed VX is, for example,45 km per hour. The predetermined vehicle speed VX can be less than 45km per hour and can be, for example, 25 km per hour.

For example, upon determining the rotational speed NC of the crank axle12 is less than a predetermined rotational speed NCX, the controller 72stops driving the motor 24 in accordance with at least one of therotational speed N of the crank 28 and the human driving force H. Thepredetermined rotational speed NCX is, for example, 0 rpm. For example,upon determining the rotational speed NC of the crank axle 12 is greaterthan or equal to a predetermined rotational speed NCY, the controller 72can stop the motor 24 or can control the motor 24 to decrease the assistforce M. The predetermined rotational speed NCY is greater than apredetermined rotational speed NC and, for example, has a value in arange from 120 rpm to 200 rpm.

Preferably, the controller 72 is configured to control the electricactuator 48. Preferably, the controller 72 is configured to control theelectric actuator 48 and the motor 24. The controller 72 outputs ashifting control signal for changing the transmission ratio R to theelectric actuator 48. In a case where the shifting control signal isinput, the electric actuator 48 is actuated to operate the derailleur22. The shifting control signal includes, for example, electric powerfor driving the electric actuator 48. Preferably, the shifting controlsignal includes a first shifting control signal including an instructionthat the electric actuator 48 operates the derailleur 22 to increase thetransmission ratio R and a second shifting control signal including aninstruction that the electric actuator 48 operates the derailleur 22 todecrease the transmission ratio R.

Preferably, upon determining a shifting condition is satisfied, thecontroller 72 is configured to control the electric actuator 48 so thatthe derailleur 22 is actuated to change the transmission ratio R. Upondetermining a shifting condition for increasing the transmission ratio Ris satisfied, the controller 72 transmits the first shifting controlsignal to the electric actuator 48 to operate the derailleur 22 so thatthe electric actuator 48 increases the transmission ratio R. Upondetermining a shifting condition for decreasing the transmission ratio Ris satisfied, the controller 72 transmits the second shifting controlsignal to the electric actuator 48 to operate the derailleur 22 so thatthe electric actuator 48 decreases the transmission ratio R.

In the present embodiment, the shifting condition is satisfied in a casewhere a shifting execution condition is satisfied and shifting is notprohibited. The shifting condition can be satisfied in a case where theshifting execution condition is satisfied. The shifting executioncondition is satisfied, for example, in at least one of a case where theshifting operation signal is input to the controller 72 from the secondoperating device 45 and a case where a predetermined condition relatedto a travel state of the human-powered vehicle 10 is satisfied. Thecontroller 72 can control the derailleur 22 in accordance with a manualoperation performed by the user on the second operating device 45, canautomatically control the derailleur 22 in accordance with the travelstate of the human-powered vehicle 10, or can control the derailleur 22in accordance with both the manual operation performed by the user onthe second operating device 45 and the travel state of the human-poweredvehicle 10.

The controller 72 can be configured to switch between a manual shiftingmode and an automatic shifting mode. In the manual shifting mode, thederailleur 22 is controlled in accordance with the manual operationperformed by the user on the second operating device 45. In theautomatic shifting mode, the derailleur 22 is automatically controlledin accordance with the travel state of the human-powered vehicle 10. Forexample, a third operating device can be provided on the handlebar 42 toswitch between the manual shifting mode and the automatic shifting mode.Upon determining the user operates the third operating device, thecontroller 72 can switch between the manual shifting mode and theautomatic shifting mode. For example, the controller 72 alternatelyswitches between the manual shifting mode and the automatic shiftingmode each time the third operating device is operated. For example, upondetermining the second operating portion 45A and the third operatingportion 45B of the second operating device 45 are simultaneouslyoperated, the controller 72 can switch between the manual shifting modeand the automatic shifting mode.

For example, upon determining the second operating device 45 is operatedin the manual shifting mode, the controller 72 can be configured to beautomatically switchable from the manual shifting mode to the automaticshifting mode in correspondence with a difference between a firstrotational speed N1, which is calculated in accordance with therotational speed NW of the wheel 16 and the transmission ratio R, and apredetermined rotational speed or a rotational speed in a predeterminedrange. The first rotational speed N1 is obtained from equation (2).

First Rotational Speed N1=Rotational Speed NW/Transmission RatioR  Equation (2):

For example, in a case of switching to the automatic shifting mode, thecontroller 72 controls the motor 24 and the electric actuator 48 so thatthe transmission ratio R is set in correspondence with a differencebetween the first rotational speed N1 stored in the storage 74 and thepredetermined rotational speed or the rotational speed in thepredetermined range. In any one of a case of automatically switching tothe automatic shifting mode and a case of switching to the automaticshifting mode by operation of the user, the controller 72 can beconfigured to be switchable from the automatic shifting mode to themanual shifting mode in at least one of a case where a predeterminedtime elapses, a case where the human driving force H becomes greaterthan or equal to a predetermined value, and a case where the rotationalamount of the crank axle 12 becomes greater than or equal to apredetermined rotational amount.

The predetermined condition related to the travel state of thehuman-powered vehicle 10 is satisfied, for example, in at least one of acase where the rotational speed NC of the crank axle 12 is outside apredetermined first range, a case where the human driving force H isoutside a predetermined second range, and a case where the human-poweredvehicle 10 is decelerated. The predetermined condition related to thetravel state of the human-powered vehicle 10 can be satisfied in onlyone or any two of a case where the rotational speed NC of the crank axle12 is outside a predetermined first range, a case where the humandriving force H is outside a predetermined second range, and a casewhere the human-powered vehicle 10 is decelerated. The controller 72 isconfigured to control the electric actuator 48 so that the firstrotational speed N1 is included in a predetermined range.

Preferably, the case where the human-powered vehicle 10 is deceleratedincludes a case where the deceleration in a direction corresponding tothe traveling direction of the human-powered vehicle 10 is greater thana predetermined deceleration. Preferably, the predetermined decelerationcorresponds to a deceleration in a case where the human-powered vehicle10 is quickly decelerated as a result of hard braking.

The shifting execution condition can include a condition related to atraveling resistance of the human-powered vehicle 10. The travelingresistance includes, for example, at least one of air resistance,rolling resistance, gradient resistance, and acceleration resistance.The controller 72 can control the electric actuator 48, for example, todecrease the transmission ratio R upon determining the travelingresistance is increased, and to increase the transmission ratio R upondetermining the traveling resistance is decreased.

The controller 72 includes at least one of the following configurations(A1), (A2), (A3), and (A4). The controller 72 can include two, three, orall of the configurations (A1), (A2), (A3), and (A4).

(A1) The controller 72 is configured to control the electric actuator 48so that the transmission ratio R does not increase in a case where thevehicle speed V of the human-powered vehicle 10 is greater than or equalto a second speed V2 or the rotational speed NW of the wheel 16 isgreater than or equal to a predetermined rotational speed NWX. In theconfiguration (A1), the controller 72 can be configured to control theelectric actuator 48 so that the transmission ratio R does not increasein a case where the vehicle speed V of the human-powered vehicle 10 isgreater than or equal to the second speed V2 and the rotational speed NWof the wheel 16 is greater than or equal to the predetermined rotationalspeed NWX.

(A2) The controller 72 is configured to control the electric actuator 48so as not to change the transmission ratio R until a first conditionrelated to shifting is satisfied in a case where the derailleur 22 isactuated.

(A3) The controller 72 is configured to control the electric actuator 48so as not to change the transmission ratio R with the derailleur 22until a second condition related to shifting is satisfied in a casewhere the electric actuator 48 and the motor 24 are controlled toincrease or decrease the transmission ratio R a predetermined number oftimes or more within a predetermined third time T3.

(A4) The controller 72 is configured to control the electric actuator 48so as not to change the transmission ratio R with the derailleur 22 upondetermining the vehicle speed V of the human-powered vehicle 10 is lessthan or equal to a first speed V1 or the rotational speed NW of thewheel 16 is less than or equal to a predetermined rotational speed NXeven if the predetermined condition related to the travel state of thehuman-powered vehicle 10 is satisfied.

In a case where the controller 72 includes the configuration (A1), thecontroller 72 does not execute control on the electric actuator 48 thatincreases the transmission ratio R in at least one of a case where thevehicle speed V of the human-powered vehicle 10 is greater than or equalto the second speed V2 and a case where the rotational speed NW of thewheel 16 is greater than or equal to the predetermined rotational speedNWX. For example, in at least one of a case where the vehicle speed V ofthe human-powered vehicle 10 is greater than or equal to the secondspeed V2 and a case where the rotational speed NW of the wheel 16 isgreater than or equal to the predetermined rotational speed NWX, thecontroller 72 does not transmit the first shifting control signal to theelectric actuator 48. For example, in at least one of a case where thevehicle speed V of the human-powered vehicle 10 is greater than or equalto the second speed V2 and a case where the rotational speed NW of thewheel 16 is greater than or equal to the predetermined rotational speedNWX, the controller 72 is configured to transmit the second shiftingcontrol signal to the electric actuator 48 in correspondence with theshifting execution condition. In at least one of a case where thevehicle speed V is greater than or equal to the second speed V2 and therotational speed NW of the wheel 16 is greater than or equal to thepredetermined rotational speed NWX, the controller 72 controls theelectric actuator 48 so as not to increase the transmission ratio R, sothat increases in the vehicle speed V of the human-powered vehicle 10are limited.

In a case where the controller 72 includes the configuration (A2), thecontroller 72 is configured to control the electric actuator 48 so asnot to change the transmission ratio R until the first condition relatedto shifting is satisfied, for example, in a case where the derailleur 22is actuated by operation of the second operating device 45. Preferably,the first condition related to shifting is satisfied in at least one ofa case where a predetermined first time T1 elapses from the time ofoperating the second operating device 45, a case where a predeterminedsecond time T2 elapses from the time of stopping the electric actuator48, a case where the inclination angle D of the human-powered vehicle 10becomes greater than or equal to a predetermined first angle D1, and acase where the vehicle speed V of the human-powered vehicle 10 becomesgreater than or equal to a predetermined third speed V3. The controller72 does not execute control on the electric actuator 48 that changes thetransmission ratio R upon determining the derailleur 22 has beenactuated and the first condition related to shifting is not satisfied.For example, upon determining the derailleur 22 has been actuated andthe first condition related to shifting is not satisfied, the controller72 does not output the first shifting control signal and the secondshifting control signal to the electric actuator 48. The predeterminedfirst time T1 is, for example, included in a range from 0.1 seconds to10 seconds. The predetermined second time T2 is, for example, includedin a range from 0.1 seconds to 10 seconds. The predetermined first angleD1 is, for example, a pitch angle of the human-powered vehicle 10 thatis greater than or equal to 5 degrees.

In a case where the controller 72 includes the configuration (A3), thesecond condition related to shifting is satisfied, for example, in atleast one of a case where a predetermined fourth time T4 elapses fromthe time of stopping the electric actuator 48, a case where theinclination angle D of the human-powered vehicle 10 becomes greater thanor equal to a predetermined second angle D2, and a case where thevehicle speed of the human-powered vehicle 10 becomes greater than orequal to a predetermined fourth speed V4. The controller 72 does notexecute control on the electric actuator 48 that changes thetransmission ratio R upon determining the second condition related toshifting is not satisfied and the electric actuator 48 and the motor 24are controlled to increase or decrease the transmission ratio R apredetermined number of times or more within the predetermined thirdtime T3. For example, the controller 72 does not output the firstshifting control signal and the second shifting control signal to theelectric actuator 48 upon determining the second condition related toshifting is not satisfied and the electric actuator 48 and the motor 24are controlled to increase or decrease the transmission ratio R apredetermined number of times or more within the predetermined thirdtime T3. The predetermined fourth time T4 is, for example, included in arange from 0.1 seconds to 10 seconds. The fourth speed V4 is, forexample, greater than or equal to 3 km per hour. The predeterminedsecond angle D2 is, for example, a pitch angle of the human-poweredvehicle 10 that is greater than or equal to 5 degrees.

In a case where the controller 72 includes the configuration (A4), thefirst speed V1 and the predetermined rotational speed NX have valuesthat are, for example, appropriate for determining a stoppage oftraveling of the human-powered vehicle 10. The first speed V1 has, forexample, a value in a range from 0 km/h to 3 km/h. The predeterminedrotational speed NX has, for example, a value in a range from 0 rpm to 5rpm. Upon determining the first speed V1 and the predeterminedrotational speed NX have values that are appropriate for determining astoppage of traveling of the human-powered vehicle 10, the controller 72restricts changes in the transmission ratio R in a case where thehuman-powered vehicle 10 stops. This avoids a situation in which thehuman-powered vehicle 10 stops during a shifting operation of thederailleur 22.

The controller 72 is configured to control the motor 24 and drive thetransmission body 20 with the motor 24 upon determining the derailleur22 has been actuated to change the transmission ratio R and apredetermined condition related to pedaling is satisfied. Preferably,the controller 72 is configured to control the motor 24 and drive thetransmission body 20 so as not to apply a propulsion force to thehuman-powered vehicle 10 upon determining the derailleur 22 has beenactuated to change the transmission ratio R and the predeterminedcondition related to pedaling is satisfied. The controller 72 drives thetransmission body 20 so as not to transmit driving force of the motor 24to the rear wheel 16A upon determining the derailleur 22 has beenactuated to change the transmission ratio R and the predeterminedcondition related to pedaling is satisfied. For example, the controller72 is configured to control the motor 24 so that the transmission body20 is driven by the motor 24 and the rear wheel 16A is not rotated bythe motor 24. For example, the controller 72 is configured to controlthe motor 24 so that the rotational speed of the second rotational body18 becomes less than or equal to the rotational speed of the rear wheel16A. The controller 72 can control the motor 24 so as not to apply apropulsion force to the human-powered vehicle 10 in correspondence withinformation related to the rotational speed or rotational torque of themotor 24 stored in the storage 74 in advance.

Preferably, the controller 72 is configured to control the electricactuator 48 and the motor 24 so that relative movement of the derailleur22 and at least one of the first rotational body 14 and the secondrotational body 18 is started simultaneously as the motor 24 is drivenor before the motor 24 is driven in a case where the electric actuator48 and the motor 24 are controlled to change the transmission ratio Rand the predetermined condition related to pedaling is satisfied. Thecontroller 72 can be configured to control the electric actuator 48 andthe motor 24 so that relative movement of the derailleur 22 and at leastone of the first rotational body 14 and the second rotational body 18 isstarted after the motor 24 is driven in a case where the electricactuator 48 and the motor 24 are controlled to change the transmissionratio R and the predetermined condition related to pedaling issatisfied.

In the shifting condition, the controller 72 can be configured tocontrol the electric actuator 48 so that the derailleur 22 is actuatedover a plurality of shift stages. In this case, the shifting controlsignal includes a signal for actuating the derailleur 22 over aplurality of shift stages. The controller 72 can be configured tocontrol the motor 24 so that the rotational speed of the motor 24 in acase where the derailleur 22 changes the shift stage twice or more toreach the target transmission ratio R is greater than the rotationalspeed of the motor 24 in a case where the derailleur 22 changes theshift stage only once to reach the target transmission ratio R.Preferably, the controller 72 is configured to control the motor 24 anddrive the transmission body 20 with the motor 24 upon determining thederailleur 22 has been actuated to change the transmission ratio R andthe predetermined condition related to pedaling is satisfied.

The controller 72 is configured to control the electric actuator 48 sothat the shift stage of the derailleur 22 approaches a predeterminedshift stage or the transmission ratio R approaches a predeterminedtransmission ratio R in a case where the human-powered vehicle 10 isdecelerated. The controller 72 is configured to control the electricactuator 48 and change the shift stage of the derailleur 22 one stage ata time in a case where a difference of the predetermined shift stage andthe present shift stage of the derailleur 22 or a difference of thepredetermined transmission ratio R and the present transmission ratio Ris less than or equal to a predetermined value. The controller 72 isconfigured to control the electric actuator 48 so as to continuouslyactuate the derailleur 22 over a plurality of shift stages upondetermining either the difference of the predetermined shift stage andthe present shift stage of the derailleur 22 or the difference of thepredetermined transmission ratio R and the present transmission ratio Rexceeds the predetermined value.

Information related to the predetermined shift stage or informationrelated to the predetermined transmission ratio R is, for example,stored in the storage 74 as the target transmission ratio R in a casewhere the human-powered vehicle 10 is decelerated. In a case whereshifting is performed in correspondence with the information related tothe predetermined shift stage, it is preferred that the predeterminedvalue is such that the difference of the predetermined shift stage andthe present shift stage of the derailleur 22 corresponds to a range fromone stage to three stages. In a case where shifting is performed incorrespondence with the information related to the predeterminedtransmission ratio R, it is preferred that the predetermined value issuch that the difference of the predetermined transmission ratio R andthe present transmission ratio R corresponds to a range from one stageto three stages if converted into shift stage.

Preferably, the controller 72 is configured to control the electricactuator 48 so that a fifth time T5 during which the derailleur 22 isactuated over a plurality of shift stages in a case where the vehiclespeed V of the human-powered vehicle 10 is less than or equal to apredetermined fifth speed V5 becomes shorter than a sixth time T6 duringwhich the derailleur 22 is actuated over a plurality of shift stages ina case where the vehicle speed V of the human-powered vehicle 10 exceedsthe predetermined fifth speed V5. In a case where the second rotationalbody 18 includes one or more shift facilitation regions that aresuitable for shifting, as the vehicle speed V increases, it takes ashorter time for the shifting facilitation region of the secondrotational body 18, after passing through the region in which thetransmission body 20 is moved by the derailleur 22, to again passthrough to the region in which the transmission body 20 moves.

Preferably, the fifth speed V5 is less than or equal to 10 km per hour.Preferably, the fifth time T5 is set to a sufficient time to change thetransmission ratio R over a plurality of shift stages in correspondencewith the shifting control signal in a case where the vehicle speed V ofthe human-powered vehicle 10 is less than or equal to the predeterminedfifth speed V5. Preferably, the sixth time T6 is set to a sufficienttime to change the transmission ratio R over a plurality of shift stagesin correspondence with the shifting control signal in a case where thevehicle speed V of the human-powered vehicle 10 exceeds thepredetermined fifth speed V5.

The controller 72 can be configured to change the actuation speed of thederailleur 22 in a case where the derailleur 22 is actuated over aplurality of shift stages. The controller 72 can be configured tocontrol the electric actuator 48 to stop the derailleur 22 each time theshift stage is changed by one stage and change a predetermined intervaluntil the next actuation starts. The predetermined interval is, forexample, in a range that is greater than or equal to 0.5 seconds andless than 1 second in a case where the vehicle speed V is less than orequal to 15 km per hour, and in a range that is greater than or equal to0.25 seconds and less than 0.5 seconds in a case where the vehicle speedV is greater than 15 km per hour. The shifting condition can include acondition for shifting the derailleur 22 over a plurality of shiftstages or can include only a condition for shifting the derailleur 22 byonly one stage.

Preferably, the predetermined condition related to pedaling is satisfiedin at least one of a case where the human driving force H input to thecrank axle 12 is less than or equal to a predetermined driving force HX,a case where the rotational speed NC of the crank axle 12 is less thanor equal to a second rotational speed NC2, and a case where the crankaxle 12 is oscillating. Preferably, the predetermined condition relatedto pedaling determines that pedaling is stopped. Preferably, thepredetermined driving force HX and the second rotational speed NC2 havevalues that are appropriate for determining a stoppage of rotation ofthe crank axle 12 of the human-powered vehicle 10. The predetermineddriving force HX has, for example, a value in a range from 0 Nm to 3 Nm.The second rotational speed NC2 has, for example, a value in a rangefrom 0 rpm to 5 rpm. The case where the crank axle 12 is oscillatingincludes a case where the crank axle 12 is not completely stopped and arotational angle CC of the crank axle 12 is maintained in apredetermined angle range. The predetermined angle range is, forexample, greater than or equal to 1 degree and less than or equal to 20degrees.

For example, in a case where the feet of the rider are on the pedals 34and the rider is not pedaling, the crank axle 12 can oscillate. In acase where rotation of the crank axle 12 is stopped or the crank axle 12is oscillating, the first rotational body 14 and the second rotationalbody 18 are not rotated by the human driving force H. Therefore,shifting cannot be performed even in a case where the derailleur 22 isactuated. In a case where the derailleur 22 is actuated to change thetransmission ratio R and rotation of the crank axle 12 is stopped or thecrank axle 12 is oscillating, the controller 72 is configured to controlthe motor 24 and drive the transmission body 20 with the motor 24, sothat the first rotational body 14 and the second rotational body 18 arerotated. This allows the derailleur 22 to perform shifting.

The controller 72 includes at least one of the following configurations(B1), (B2), (B3), and (B4) and controls the motor 24 in a case where thederailleur 22 is actuated to change the transmission ratio R and thepredetermined condition related to pedaling is satisfied. The controller72 can include two, three, or all of the configurations (B1), (B2),(B3), and (B4).

(B1) The controller 72 is configured control the motor 24 and drive thetransmission body 20 with the motor 24 so as to increase the rotationalspeed NM of the motor 24 as a difference DN of the first rotationalspeed N1, which is calculated in correspondence with the rotationalspeed NW of the wheel 16 and the transmission ratio R, and thepredetermined rotational speed NX or a rotational speed NA in apredetermined range increases. Preferably, the first rotational speedN1, the predetermined rotational speed NX, and the rotational speed NAin the predetermined range correspond to the rotational speed NC of thecrank axle 12. The predetermined rotational speed NX and the rotationalspeed NA in the predetermined range are greater than or equal to 50 rpmand less than or equal to 80 rpm.

(B2) The controller 72 is configured to change the rotational speed ofthe motor 24 in correspondence with the acceleration of thehuman-powered vehicle 10 in the traveling direction. The controller 72is configured to control the motor 24 and drive the transmission body 20with the motor 24 to increase the rotational speed NM of the motor 24 asthe acceleration of the human-powered vehicle 10 increases.

(B3) The controller 72 is configured to control the motor 24 to changeat least one of a rotational angle CA of the motor 24 and the outputtorque MT of and the motor 24 in correspondence with a state of thehuman-powered vehicle 10. The state of the human-powered vehicle 10includes at least one of the rotational speed NW of the wheel 16 and thetransmission ratio R. Preferably, the controller 72 is configured tocontrol the motor 24 so as to increase at least one of a rotationalangle MN of the motor 24 and the output torque MT as the difference ofthe first rotational speed N1, which is calculated in correspondencewith the rotational speed NW of the wheel 16 and the transmission ratioR, and the predetermined rotational speed NX or the rotational speed NAin the predetermined range increases.

(B4) The controller 72 is configured to control the motor 24 to changeat least one of the rotational angle CA of the motor 24 and the outputtorque MT of and the motor 24 in correspondence with a state of thehuman-powered vehicle 10. The state of the human-powered vehicle 10includes a change in the vehicle speed V of the human-powered vehicle 10or a change in the rotational speed NW of the wheel 16. Preferably, thecontroller 72 is configured to control the motor 24 and drive thetransmission body 20 with the motor 24 to increase at least one of therotational angle of the motor 24 and the output torque MT as anacceleration or a deceleration of the human-powered vehicle 10 increasesin the traveling direction or an acceleration or a deceleration of therotational speed NW of the wheel 16 in a rotational directioncorresponding to the traveling direction of the human-powered vehicle 10increases. The controller 72 is configured to calculate the accelerationor deceleration of the human-powered vehicle 10 in the travelingdirection, for example, by differentiating the vehicle speed V. Thehuman-powered vehicle 10 can include an acceleration sensor that detectsinformation related to the acceleration or deceleration of thehuman-powered vehicle 10 in the traveling direction. In a case where thehuman-powered vehicle 10 includes an acceleration sensor, the controller72 receives information detected by the acceleration sensor.

Instead of or in addition to at least one of the configurations (B1),(B2), (B3), and (B4), the human-powered vehicle 10 can be configured tocontrol so that output of the motor 24 differs in correspondence withthe transmission ratio R or the shift stage. Preferably, the storage 74stores information related to the transmission ratio R in associationwith information related to output of the motor 24. The association ofinformation related to the transmission ratio R with information relatedto output of the motor 24 can be stored as a table or a function. Thecontroller 72 is configured to control the motor 24 in correspondencewith the detection result of the transmission state sensor 88 and theinformation stored in the storage 74.

Preferably, the controller 72 is configured to control the motor 24 soas not to drive the transmission body 20 if the first operating device44 is operated even upon determining the derailleur 22 has been actuatedto change the transmission ratio R and the predetermined conditionrelated to pedaling is satisfied. The controller 72 is configured tocontrol the motor 24 so as not to drive the transmission body 20 if anon-driving condition of the motor 24 is satisfied even upon determiningthe derailleur 22 has been actuated to change the transmission ratio Rand the predetermined condition related to pedaling is satisfied. Thenon-driving condition of the motor 24 includes at least one of a firstnon-driving condition and a second non-driving condition. In a casewhere only one or both of the first non-driving condition and the secondnon-driving condition are satisfied, the controller 72 can be configuredto control so that the motor 24 is stopped.

The first non-driving condition is satisfied at least one of duringoperation of the first operating device 44 and in a predetermined periodafter the first operating device 44 is operated. In a case where thecontroller 72 controls the motor 24 under the first non-drivingcondition, the controller 72 is configured to control the motor 24 so asnot to drive the transmission body 20 at least one of during operationof the first operating device 44 and in the predetermined period afterthe first operating device 44 is operated even upon determining thederailleur 22 has been actuated to change the transmission ratio R andthe predetermined condition related to pedaling is satisfied.

The second non-driving condition is satisfied in a case where the firstoperating portion 44A of the first operating device 44 is operated or apredetermined operation is performed on the first operating device 44.In a case where the controller 72 controls the motor 24 under the secondnon-driving condition, the controller 72 is configured to control themotor 24 so as not to drive the transmission body 20 if the firstoperating portion 44A of the first operating device 44 is operated orthe predetermined operation is performed on the first operating portion44A even upon determining the derailleur 22 has been actuated to changethe transmission ratio R and the predetermined condition related topedaling is satisfied.

Instead of or in addition to at least one of the first non-drivingcondition and the second non-driving condition, the controller 72 can beconfigured to control the motor 24 so as not to drive the transmissionbody 20 upon determining at least one of the following third to sixthnon-driving conditions is satisfied.

The third non-driving condition is satisfied in a case where theacceleration of the human-powered vehicle 10 in the traveling directionis greater than a first value. The fourth non-driving condition issatisfied in a case where the deceleration of the human-powered vehicle10 in the traveling direction is greater than a second value. The fifthnon-driving condition is satisfied in a case where the acceleration ofthe rotational speed NW of the wheel 16 in the rotational directioncorresponding to the traveling direction of the human-powered vehicle 10is greater than a third value. The sixth non-driving condition issatisfied in a case where the deceleration of the rotational speed NW ofthe wheel 16 in the rotational direction corresponding to the travelingdirection of the human-powered vehicle 10 is greater than a fourthvalue. The controller 72 is configured to calculate at least one of theacceleration and deceleration of the rotational speed NW of the wheel 16in the rotational direction corresponding to the traveling direction ofthe human-powered vehicle 10, for example, by differentiating therotational speed NW of the wheel 16. The first value and the third valuecorrespond to a quick acceleration of the human-powered vehicle 10 andare set in advance based on, for example, tests. The second value andthe fourth value correspond to a quick deceleration of the human-poweredvehicle 10 and are set in advance based on, for example, tests. In acase where the human-powered vehicle 10 is quickly accelerating ordecelerating in the traveling direction, the controller 72 restrictschanges in the transmission ratio R.

In a case where the controller 72 controls the motor 24 and drives thetransmission body 20 with the motor 24 upon determining thepredetermined condition related to pedaling is satisfied, the controller72 is configured to control the motor 24 to stop driving thetransmission body 20 with the motor 24 upon determining a stop conditionof the motor 24 is satisfied. The stop condition of the motor 24includes at least one of a first stop condition and a second stopcondition. In a case where only one or both of the first stop conditionand the second stop condition are satisfied, the controller 72 can beconfigured to control so that the motor 24 is stopped.

The first stop condition relates to the load L of the motor 24. In acase where the motor 24 is controlled under the first stop condition,for example, the controller 72 is configured to control the motor 24 anddrive the transmission body 20 with the motor 24 upon determining thederailleur 22 has been actuated to change the transmission ratio R andthe predetermined condition related to pedaling is satisfied, and stopdriving the transmission body 20 with the motor 24 in correspondencewith the load L of the motor 24. The first stop condition is satisfied,for example, in a case where the load L of the motor 24 is greater thanor equal to a predetermined load L1. Preferably, in a case where thederailleur 22 is actuated to change the transmission ratio R, thepredetermined condition related to pedaling is satisfied, and the load Lof the motor 24 is greater than or equal to the predetermined load L1,the controller 72 is configured to control the motor 24 so that themotor 24 is stopped.

The predetermined load L1 is set to, for example, a value that isgreater than a load L generated to rotate the rear wheel 16A only withdriving force of the motor 24 in a case where the rear wheel 16A of thehuman-powered vehicle 10 is not in contact with the ground and is freelyrotatable, and less than a load L generated to propel the human-poweredvehicle 10 on a level road. In this case, in a state where the rearwheel 16A of the human-powered vehicle 10 is not in contact with theground and is freely rotatable, the transmission body 20 is driven bythe motor 24. In a state where the rear wheel 16A of the human-poweredvehicle 10 is in contact with the ground, the human-powered vehicle 10will not be propelled on the level road only by driving force of themotor 24.

The second stop condition relates to the vehicle speed V of thehuman-powered vehicle 10 or the rotational speed NW of the wheel 16. Thesecond stop condition is satisfied in a case where the vehicle speed Vof the human-powered vehicle 10 is less than or equal to the first speedV1 or the rotational speed NW of the wheel 16 is less than or equal tothe predetermined rotational speed NX. In a case where the motor 24 iscontrolled under the second stop condition, the controller 72 isconfigured to control the motor 24 and stop driving the transmissionbody 20, for example, upon determining the predetermined conditionrelated to pedaling is satisfied and the vehicle speed V of thehuman-powered vehicle 10 becomes less than or equal to the first speedV1 or the rotational speed NW of the wheel 16 becomes less than or equalto the predetermined rotational speed NX. The first speed V1 and thepredetermined rotational speed NX have values that are, for example,appropriate for determining a stoppage of traveling of the human-poweredvehicle 10. The first speed V1 has, for example, a value in a range from0 km/h to 3 km/h. The predetermined rotational speed NX has, forexample, a value in a range from 0 rpm to 5 rpm.

Even in a case where the human-powered vehicle 10 is coasting, thecontroller 72 restricts changes in the transmission ratio R in a casewhere the human-powered vehicle 10 stops. In a case where the motor 24is controlled under the second stop condition, the controller 72 can beconfigured to control the motor 24 and stop driving the transmissionbody 20, for example, upon determining the predetermined conditionrelated to pedaling is satisfied, the predetermined condition related toa travel state of the human-powered vehicle 10 is satisfied, and thevehicle speed V of the human-powered vehicle 10 becomes less than orequal to the first speed V1 or the rotational speed NW of the wheel 16becomes less than or equal to the predetermined rotational speed NX. Ina case where the controller 72 changes the transmission ratio R with thederailleur 22 based on the traveling condition regardless of anintention of the rider, this configuration avoids a situation in whichthe transmission ratio R is decreased in a case where the human-poweredvehicle 10 stops. The controller 72 can be configured to set a lowerlimit value of the transmission ratio R upon determining either thevehicle speed V becomes less than or equal to the first speed V1 or therotational speed NW of the wheel 16 becomes less than or equal to thepredetermined rotational speed NX.

In a case where the vehicle speed V becomes less than or equal to thefirst speed V1 or the rotational speed NW of the wheel 16 becomes lessthan or equal to the predetermined rotational speed NX, the controller72 changes the transmission ratio R with the derailleur 22 so that thetransmission ratio R will not become less than the lower limit value. Inthis case, the human-powered vehicle 10 will not resume traveling in astate where the transmission ratio R is less than the lower limit value.Thus, the human-powered vehicle 10 resumes traveling in a preferredmanner. The lower limit value of the transmission ratio R is stored inthe storage 74. The controller 72 can be configured to change the lowerlimit value of the transmission ratio R stored in the storage 74 inaccordance with operation performed by the user on the first operatingdevice 44 or an external device 90. The external device 90 includes, forexample, at least one of a personal computer, a tablet computer, and asmartphone.

Instead of or in addition to the configuration that controls the motor24 under at least one of the first stop condition and the second stopcondition, the controller 72 can be configured to stop the motor 24based on at least one of a third stop condition and a fourth stopcondition. The third stop condition is satisfied in a case where themotor 24 is driven but the transmission ratio R remains the same. Thefourth stop condition is satisfied in a case where braking force of abrake device of the human-powered vehicle 10 is greater than or equal toa predetermined braking force.

A process of the controller 72 for controlling the motor 24 and theelectric actuator 48 to change the transmission ratio R will bedescribed with reference to FIG. 5 . In a case where electric power issupplied to the controller 72, the controller 72 starts the process andproceeds to step S11 of the flowchart illustrated in FIG. 5 . Uponcompletion of the flowchart illustrated in FIG. 5 , the controller 72repeats the process from step S11 in predetermined cycles until thesupply of electric power is stopped.

In step S11, the controller 72 determines whether the shifting executioncondition is satisfied. In a case where the shifting condition is notsatisfied, the controller 72 ends the process. In a case where theshifting condition is satisfied, the controller 72 proceeds to step S12.

In step S12, the controller 72 determines the target transmission ratioR and proceeds to step S10. In step S12, a target shift stage can bedetermined instead of the target transmission ratio R.

In step S10, the controller 72 determines whether shifting isperformable. In a case where it is determined that shifting isperformable, the controller 72 proceeds to step S13. In a case where itis determined that shifting is not performable, the controller 72 endsthe process. The derailleur 22, the first rotational body 14 and thesecond rotational body 18 form a transmission. The transmission isconfigured to perform shifting in a range that is greater than or equalto a minimum transmission ratio R and less than or equal to a maximumtransmission ratio R that are determined by the first rotational body 14and the second rotational body 18. In a case where the presenttransmission ratio R is the minimum transmission ratio R, the controller72 is configured not to execute control that decreases the transmissionratio R.

In a case where the present transmission ratio R is the maximumtransmission ratio R, the controller 72 is configured not to executecontrol that increases the transmission ratio R. The controller 72determines, for example, whether the target transmission ratio R isgreater than or equal to the minimum transmission ratio R and less thanor equal to the maximum transmission ratio R, which are determined bythe first rotational body 14 and the second rotational body 18.Information related to the minimum transmission ratio R and the maximumtransmission ratio R is stored in the storage 74. In step S10, in a casewhere the target transmission ratio R is greater than or equal to theminimum transmission ratio R and less than or equal to the maximumtransmission ratio R, which are determined by the first rotational body14 and the second rotational body 18, the controller 72 determines thatshifting is performable and proceeds to step S13. In step S10, in a casewhere the target transmission ratio R is not greater than or equal tothe minimum transmission ratio R and not less than or equal to themaximum transmission ratio R, which are determined by the firstrotational body 14 and the second rotational body 18, the controller 72determines that shifting is not performable and ends the process.

In a case where the target shift stage is determined instead of thetarget transmission ratio R in step S12, the controller 72 can comparethe target shift stage with information related to the shift stagestored in the storage 74 in step S10. For example, the target shiftstage is a thirteenth shift stage and the storage 74 stores informationrelated to first to twelfth shift stages, the controller 72 determinesthat shifting is not performable and ends the process.

In step S13, the controller 72 determines whether the predeterminedcondition related to pedaling is satisfied. In a case where thepredetermined condition related to pedaling is satisfied, the controller72 proceeds to step S20.

In step S20, the controller 72 determines whether the non-drivingcondition is satisfied. In a case where the non-driving condition is notsatisfied, the controller 72 proceeds to step S30. In a case where thenon-driving condition is satisfied, the controller 72 ends the process.

In step S30, the controller 72 determines whether shifting isprohibited. In step S30, in a case where it is determined that shiftingis not prohibited, the controller 72 proceeds to step S14. In step S30,in a case where it is determined that shifting is prohibited, thecontroller 72 ends the process. The controller 72 determines whethershifting is prohibited, for example, in accordance with at least one ofthe configurations (B1), (B2), (B3), and (B4). For example, in a casewhere the controller 72 includes the configuration (B1), the controller72 determines that shifting is prohibited in a case where the targettransmission ratio R is greater than the present transmission ratio R.In a case where the target transmission ratio R is less than the presenttransmission ratio R, the controller 72 determines that shifting is notprohibited.

For example, in a case where the controller 72 includes theconfiguration (B2), the controller 72 determines that shifting isprohibited until the first condition related to shifting is satisfiedupon determining the derailleur 22 has been actuated, and determinesthat shifting is not prohibited in a case where the first conditionrelated to shifting is satisfied. For example, in a case where thecontroller 72 includes the configuration (B3), the controller 72determines that shifting is prohibited until the second conditionrelated to shifting is satisfied in a case where the electric actuator48 and the motor 24 are controlled to increase or decrease thetransmission ratio R a predetermined number of times or more within thepredetermined third time T3. In a case where the second conditionrelated to shifting is satisfied, the controller 72 determines thatshifting is not prohibited.

The predetermined third time T3 is, for example, included in a rangefrom 1 second to 10 seconds. The predetermined number of times is, forexample, included in a range from two times to ten times. For example,in a case where the controller 72 includes the configuration (B4), thecontroller 72 determines that shifting is prohibited upon determiningthe vehicle speed V of the human-powered vehicle 10 is less than orequal to the first speed V1, and determines that shifting is notprohibited upon determining the vehicle speed V of the human-poweredvehicle 10 exceeds the first speed V1. For example, in a case where thecontroller 72 includes the configuration (B4), the controller 72determines that shifting is prohibited upon determining the rotationalspeed NW of the wheel 16 is less than or equal to the predeterminedrotational speed NX, and determines that shifting is not prohibited upondetermining the rotational speed NW of the wheel 16 exceeds thepredetermined rotational speed NX.

In step S14, the controller 72 controls the motor 24 and drives thetransmission body 20 with the motor 24 and then proceeds to step S15. Instep S15, the controller 72 controls the electric actuator 48 so thatthe derailleur 22 starts a shifting action to obtain the targettransmission ratio R, and then proceeds to step S16. In the presentembodiment, the controller 72 executes steps S14 and S15 to control themotor 24 and the electric actuator 48 so that the motor 24 is drivenbefore the electric actuator 48 starts actuating. In other words, thecontroller 72 executes steps S14 and S15 to control the motor 24 and theelectric actuator 48 so that the transmission body 20 is driven beforethe derailleur 22 starts to be actuated.

The controller 72 can execute steps S14 and S15 to control the motor 24and the electric actuator 48 so that the electric actuator 48 startsactuating at the same time as the motor 24 starts driving. In otherwords, the controller 72 can execute steps S14 and S15 to control themotor 24 and the electric actuator 48 so that the derailleur 22 startsactuating at the same time as the transmission body 20 starts to bedriven. The controller 72 can execute steps S14 and S15 to control themotor 24 and the electric actuator 48 so that the motor 24 is drivenafter the electric actuator 48 starts actuating. In other words, thecontroller 72 can execute steps S14 and S15 to control the motor 24 andthe electric actuator 48 so that the transmission body 20 is drivenafter the derailleur 22 starts to be actuated.

In step S16, the controller 72 determines whether the stop condition ofthe motor 24 is satisfied. Upon determining the stop condition of themotor 24 is not satisfied, the controller 72 proceeds to step S17. Instep S17, the controller 72 determines whether shifting is completed.Upon determining shifting is not completed, the controller 72 proceedsto step S16. In step S16, upon determining the stop condition of themotor 24 is satisfied, the controller 72 proceeds to step S18. In stepS17, upon determining shifting is completed, the controller 72 proceedsto step S18. In step S18, the controller 72 controls the motor 24 tostop the motor 24 and then ends the process.

In step S13, upon determining the predetermined condition related topedaling is not satisfied, the controller 72 proceeds to step S19. Instep S19, the controller 72 controls the electric actuator 48 andactuates the derailleur 22 with the electric actuator 48 to obtain thetarget transmission ratio R, and then ends the process.

Preferably, the controller 72 is configured to receive a signal foradjusting the position of the derailleur 22. The controller 72 isconfigured drive the motor 24 in a case where the signal for adjustingthe position of the derailleur 22 is received, and is configured tocontrol the electric actuator 48 so that the position of the derailleur22 corresponds to a first transmission ratio R1 in a case where thefirst transmission ratio R1 corresponding to the rotational speed of themotor 24 and the rotational speed NW of the wheel 16 does not correspondto the present position of the derailleur 22.

The signal for adjusting the position of the derailleur 22 is, forexample, transmitted from the external device 90 connected to thecontroller 72. The signal for adjusting the position of the derailleur22 can be transmitted from the first operating device 44 or the secondoperating device 45. For example, the second operating device 45 can beconfigured to transmit the signal for adjusting the position of thederailleur 22 in a case where the second operating portion 45A and thethird operating portion 45B are simultaneously operated. Preferably, thecontrol device 70 includes an interface 89. The interface 89 includes atleast one of a wireless communication device and a connection port of acommunication line. The interface 89 is connected to the controller 72so as to communicate with the controller 72. In a case where theinterface 89 includes a wireless communication device, the interface 89is connected to perform communication with at least one of the externaldevice 90, the first operating device 44, and the second operatingdevice 45, for example, through near-field communication such asBluetooth® or ANT+®.

A process of the controller 72 for controlling the motor 24 and theelectric actuator 48 to adjust the position of the derailleur 22 willnow be described with reference to FIG. 6 . In a case in which electricpower is supplied to the controller 72, the controller 72 starts theprocess and proceeds to step S21 of the flowchart illustrated in FIG. 6. Upon completion of the flowchart illustrated in FIG. 6 , thecontroller 72 repeats the process from step S21 in predetermined cyclesuntil the supply of electric power is stopped. The position of thederailleur 22 is adjusted in a state where the rear wheel 16A of thehuman-powered vehicle 10 is not in contact with the ground and is freelyrotatable.

In step S21, the controller 72 determines whether a signal for adjustingthe position of the derailleur 22 is received. In a case where thesignal for adjusting the position of the derailleur 22 is not received,the controller 72 ends the process. In a case where the signal foradjusting the position of the derailleur 22 is received, the controller72 proceeds to step S22.

In step S22, the controller 72 controls the motor 24 and drives thetransmission body 20 with the motor 24 and then proceeds to step S23. Instep S23, the controller 72 determines whether the motor 24 is rotating.Upon determining that the motor 24 is rotating, the controller 72proceeds to step S24. Upon determining that the motor 24 is notrotating, the controller 72 proceeds to step S28. In step S23, insteadof determining whether the motor 24 is rotating, the controller 72 candetermine whether the first rotational body 14 is rotating, whether thesecond rotational body 18 is rotating, or whether the rear wheel 16A isrotating. In any one of a case where it is determined that the firstrotational body 14 is rotating, a case where it is determined that thesecond rotational body 18 is rotating, and a case where it is determinedthat the rear wheel 16A is rotating, the controller 72 proceeds to stepS24.

In step S24, the controller 72 determines whether the first transmissionratio R1 corresponding to the rotational speed NM of the motor 24 andthe rotational speed NW of the wheel 16 corresponds to the presentposition of the derailleur 22. For example, the controller 72 determineswhether the first transmission ratio R1 corresponding to the rotationalspeed NM of the motor 24 and the rotational speed NW of the wheel 16corresponds to the present position of the derailleur 22, for example,based on the present position of the derailleur 22 detected by thetransmission state sensor 88. In a case where the first transmissionratio R1 corresponding to the rotational speed NM of the motor 24 andthe rotational speed NW of the wheel 16 corresponds to the presentposition of the derailleur 22, the controller 72 proceeds to step S28.In a case where the first transmission ratio R1 corresponding to therotational speed NM of the motor 24 and the rotational speed NW of thewheel 16 does not correspond to the present position of the derailleur22, the controller 72 proceeds to step S25.

In step S25, the controller 72 controls the electric actuator 48 andstarts actuating the derailleur 22 to decrease or increase thetransmission ratio R, and then proceeds to step S26. In step S25, thecontroller 72 determines whether the derailleur 22 is actuated toincrease the transmission ratio or to decrease the transmission ratio inaccordance with the first transmission ratio R1, which corresponds tothe rotational speed NM of the motor 24 and the rotational speed NW ofthe wheel 16, and the present position of the derailleur 22 and controlsthe electric actuator 48.

In step S26, the controller 72 determines whether the first transmissionratio R1 corresponding to the rotational speed NM of the motor 24 andthe rotational speed NW of the wheel 16 corresponds to the presentposition of the derailleur 22. The controller 72 executes thedetermination process of step S26, for example, in the same manner asthat of step S24. In a case where the first transmission ratio R1corresponding to the rotational speed NM of the motor 24 and therotational speed NW of the wheel 16 does not correspond to the presentposition of the derailleur 22, the controller 72 again executes stepS26. In a case where the first transmission ratio R1 corresponding tothe rotational speed NM of the motor 24 and the rotational speed NW ofthe wheel 16 corresponds to the present position of the derailleur 22,the controller 72 proceeds to step S27.

In step S27, the controller 72 controls the electric actuator 48 to stopactuating the derailleur 22 and proceeds to step S28. In step S28, thecontroller 72 controls the motor 24 to stop the motor 24 and ends theprocess.

In the present embodiment, in a case where the motor 24 is driven instep S14, it is preferred that the controller 72 drives the motor 24 sothat the rotational speed of the second rotational body 18 driven by themotor 24 is lower than the rotational speed of the rear wheel 16A. In acase where the rotational speed of the second rotational body 18 drivenby the motor 24 is lower than the rotational speed of the rear wheel16A, driving force of the motor 24 is not transmitted to the rear wheel16A. In a case where the motor 24 is driven in step S14, the controller72 can drive the motor 24 so that the load L of the motor 24 is lessthan a load L that is generated to propel the human-powered vehicle 10on a level road.

Second Embodiment

A second embodiment of a control device 70 will now be described withreference to FIGS. 7 and 8 . The control device 70 of the secondembodiment is the same as the control device 70 of the first embodimentexcept that the second embodiment is switchable between a first mode anda second mode. Thus, the same reference characters are given to thosecomponents that are the same as the corresponding components of thefirst embodiment. Such components will not be described in detail.

The controller 72 can be configured to be switchable between the firstmode and the second mode. The controller 72 is configured to control themotor 24 in the first mode so as to drive the transmission body 20 incorrespondence with a state of the human-powered vehicle 10 upondetermining the second operating device 45 has been operated and thepredetermined condition related to pedaling is satisfied. The controller72 is configured to control the motor 24 in the second mode so as not todrive the transmission body 20 with the motor 24 upon determining thesecond operating device 45 has been operated and the predeterminedcondition related to pedaling is satisfied.

The controller 72 is configured to be switchable between the first modeand the second mode, for example, in correspondence with operation of atleast one of the second operating device 45 and the external device 90.In the first mode, the controller 72 can be configured to control themotor 24 so as to drive the transmission body 20 in correspondence witha state of the human-powered vehicle 10 upon determining the shiftingcondition is satisfied as a result of the predetermined conditionrelated to a travel state of the human-powered vehicle 10 beingsatisfied and the predetermined condition related to pedaling issatisfied. In the second mode, the controller 72 can be configured tocontrol the motor 24 so as not to drive the transmission body 20 evenupon determining the shifting condition is satisfied as a result of thepredetermined condition related to a travel state of the human-poweredvehicle 10 being satisfied and the predetermined condition related topedaling is satisfied.

A process of the controller 72 for switching between the first mode andthe second mode will be described with reference to FIG. 7 . Upondetermining electric power is supplied to the controller 72, thecontroller 72 starts the process and proceeds to step S31 of theflowchart illustrated in FIG. 7 . Upon completion of the flowchartillustrated in FIG. 7 , the controller 72 repeats the process from stepS31 in predetermined cycles until the supply of electric power isstopped.

In step S31, the controller 72 determines whether there is a request forswitching the mode. The controller 72 determines that there is a requestfor switching the mode, for example, in a case where an operation forswitching the mode is performed on at least one of the second operatingdevice 45 and the external device 90. In a case where there is norequest for switching the mode, the controller 72 ends the process. In acase where there is a request for switching the mode, the controller 72proceeds to step S32.

In step S32, the controller 72 determines whether the controller 72 isin the first mode. In a case where the controller 72 is in the firstmode, the controller 72 proceeds to step S33. In step S33, thecontroller 72 switches to the second mode and ends the process.

In step S32, in a case where the controller 72 is not in the first mode,the controller 72 proceeds to step S34. In step S34, the controller 72switches to the first mode and ends the process.

A process of the controller 72 for controlling the motor 24 and theelectric actuator 48 to change the transmission ratio R will bedescribed with reference to FIGS. 5 and 8 . In a case where electricpower is supplied to the controller 72, the controller 72 starts theprocess and proceeds to step S11 of the flowchart illustrated in FIG. 5. Upon completion of the flowchart illustrated in FIG. 5 , thecontroller 72 repeats the process from step S11 in predetermined cyclesuntil the supply of electric power is stopped.

In a case where an affirmative determination is made in step S13, thecontroller 72 proceeds to step S41 shown in FIG. 8 . In step S41, in acase where the controller 72 is in the first mode, the controller 72proceeds to step S20 shown in FIG. 5 . In step S41, in a case where thecontroller 72 is not in the first mode, the controller 72 ends theprocess.

Third Embodiment

A third embodiment of a control device 70 will now be described withreference to FIGS. 9 and 10 . The control device 70 of the thirdembodiment is the same as the control devices 70 of the first and secondembodiments except that the controller 72 does not control thederailleur 22 with the electric actuator 48. Thus, the same referencecharacters are given to those components that are the same as thecorresponding components of the first and second embodiments. Suchcomponents will not be described in detail.

In the present embodiment, the derailleur 22 is, for example, connectedto a manual transmission operating device by a Bowden cable and isconfigured to be a cable-type transmission configured to be actuated bythe user mechanically operating the Bowden cable using the manualtransmission operating device. The manual transmission operating deviceis, for example, provided on the handlebar 42.

In the present embodiment, the transmission state sensor 88 can beprovided on the derailleur 22, the Bowden cable, or the manualtransmission operating device. The transmission state sensor 88 isconfigured to detect at least one of movement of a movable portion ofthe derailleur 22, movement of the Bowden cable, and movement of themanual transmission operating device.

In the present embodiment, the controller 72 is configured to controlthe motor 24 and drive the transmission body 20 with the motor 24 upondetermining the derailleur 22 has been actuated to change thetransmission ratio R and a predetermined condition related to pedalingis satisfied.

A process of the controller 72 for controlling the motor 24 to changethe transmission ratio R will be described with reference to FIG. 10 .Upon determining electric power is supplied to the controller 72, thecontroller 72 starts the process and proceeds to step S51 of theflowchart illustrated in FIG. 10 . Upon completion of the flowchartillustrated in FIG. 10 , the controller 72 repeats the process from stepS51 in predetermined cycles until the supply of electric power isstopped.

Steps S13, S20, S14, S16, and S18 in the flowchart illustrated in FIG.10 are executed in the same manner as steps S13, S20, S14, S16, and S18in the flowchart illustrated in FIG. 5 .

In the process shown in FIG. 10 , in step S51, upon determining ashifting operation is detected, the controller 72 proceeds to step S13.The controller 72 detects a shifting operation, for example, in a casewhere output signals of the transmission state sensor 88 change. In stepS51, in a case where the shifting operation is not detected, thecontroller 72 ends the process. In step S51, in a case where theshifting operation is detected, the controller 72 proceeds to step S13.In a case where an affirmative determination is made in step S13, thecontroller 72 proceeds to step S20. In a case where an affirmativedetermination is made in step S20, the controller 72 proceeds to stepS14.

In step S14, the controller 72 controls the motor 24 and drives thetransmission body 20 with the motor 24 and then proceeds to step S16. Ina case where a negative determination is made in step S16, thecontroller 72 proceeds to step S57. In step S57, the controller 72determines whether the shifting operation is stopped. In step S57, in acase where it is determined that the shifting operation is stopped, thecontroller 72 proceeds to step S18. If it is determined that theshifting operation is not stopped, the controller 72 proceeds to stepS16. In the process shown in FIG. 10 , in step S13, in a case where thepredetermined condition related to pedaling is not satisfied, thecontroller 72 ends the process.

Fourth Embodiment

The control device 70 in accordance with a fourth embodiment will now bedescribed with reference to FIGS. 11 and 12 . The control device 70 inaccordance with the fourth embodiment differs from the control device 70in accordance with the first embodiment and the second embodiment onlyin that the controller 72 has a first shifting mode and a secondshifting mode. Thus, same reference characters are given to thoseelements that are the same as the corresponding elements of the firstembodiment. Such elements will not be described in detail.

The human-powered vehicle 10 of the present embodiment includes atransmission operating device 92. Preferably, the transmission operatingdevice 92 is configured in the same manner as at least one of the secondoperating device 45 and the third operating device of the firstembodiment. The transmission operating device 92 can differ inconfiguration from the second operating device 45.

The controller 72 is configured to control the electric actuator 48 andthe motor 24. The control device 70 is configured to be switchablebetween the first shifting mode and the second shifting mode. In thefirst shifting mode, the electric actuator 48 is controlled inaccordance with the state of the human-powered vehicle 10. In the secondshifting mode, the electric actuator 48 is controlled in accordance withthe operation of the transmission operating device 92 provided on thehuman-powered vehicle 10. Preferably, the first shifting modecorresponds to the automatic shifting mode of the first embodiment, andthe second shifting mode corresponds to the manual shifting mode of thefirst embodiment. Preferably, the first shifting mode and the secondshifting mode are switched through an operation similar to thatperformed to switch between the automatic shifting mode and the manualshifting mode.

The control device 70 is configured to be switchable between a thirdmode and a fourth mode in the first shifting mode. In the third mode,the control device 70 is configured to control the motor 24 and drivethe transmission body 20 in accordance with the state of thehuman-powered vehicle 10 upon determining the derailleur 22 has beenactuated to change the transmission ratio R and a predeterminedcondition related to pedaling is satisfied. In the fourth mode, thecontrol device 70 is configured to control the motor 24 so as not todrive the transmission body 20 even upon determining the derailleur 22has been actuated to change the transmission ratio and the predeterminedcondition related to pedaling is satisfied.

A process for switching the controller 72 between the third mode and thefourth mode in the first shifting mode will now be described withreference to FIG. 12 . In a case where the controller 72 is suppliedwith electric power, the controller 72 starts the process and proceedsto step S61 of the flowchart illustrated in FIG. 12 . Upon completion ofthe flowchart illustrated in FIG. 12 , the controller 72 repeats theprocess from step S61 in predetermined cycles until the supply ofelectric power is stopped.

In step S61, the controller 72 determines whether there is a request forswitching the first shifting mode. For example, the controller 72determines that there is a request for switching the first shifting modein a case where the transmission operating device 92 is operated toswitch the first shifting mode. In a case where there is no request forswitching the first shifting mode, the controller 72 ends the process.In a case where there is a request for switching the first shiftingmode, the controller 72 proceeds to step S62.

In step S62, the controller 72 determines whether the first shiftingmode is the third mode. If the first shifting mode is the third mode,the controller 72 proceeds to step S63. In step S63, the controller 72switches the first shifting mode to the fourth mode and then ends theprocess.

If it is not in the third mode in step S62, the controller 72 proceedsto step S64. In step S64, the controller 72 switches the first shiftingmode to the third mode and then ends the process.

Modifications

The description related to the above embodiments exemplifies, withoutany intention to limit, applicable forms of a control device for ahuman-powered vehicle and a power transmission system according to thepresent disclosure. The control device for a human-powered vehicle andthe power transmission system according to the present disclosure can beapplied to, for example, modifications of the embodiments that aredescribed below and combinations of at least two of the modificationsthat do not contradict each other. In the modifications describedhereinafter, same reference characters are given to those elements thatare the same as the corresponding elements of the above embodiments.Such elements will not be described in detail.

The controller 72 can include at least one of configurations (A5) and(A6) instead of or in addition to at least one of configurations (A1),(A2), (A3), and (A4).

(A5) The controller 72 is configured to control the electric actuator 48so that the transmission ratio R is changed only in one of an increasingdirection and a decreasing direction. The controller 72 can beconfigured to selectively change the transmission ratio R in theincreasing direction or the decreasing direction in a case where thederailleur 22 is actuated to change the transmission ratio R and thepredetermined condition related to pedaling is satisfied. In a casewhere the derailleur 22 is actuated to change the transmission ratio Rand the predetermined condition related to pedaling is satisfied, forexample, the user operates the first operating device 44 or the externaldevice 90 to selectively change the transmission ratio R in theincreasing direction or the decreasing direction.

(A6) The controller 72 is configured to control the electric actuator 48so that the transmission ratio R is changed in a predetermined shiftingrange. Information related to the predetermined shifting range is storedin the storage 74. The information related to the predetermined shiftingrange can be changeably stored in the storage 74. The user operates, forexample, the first operating device 44 or the external device 90 tochange the information related to the predetermined shifting rangestored in the storage 74.

In a first example of configuration (A6), the predetermined shiftingrange includes a range that is less than or equal to a predeterminedthird transmission ratio R3. The predetermined third transmission ratioR3 is less than the maximum transmission ratio R of the transmissionratio R that is changeable by the derailleur 22. In a second example ofconfiguration (A6), the predetermined shifting range includes a rangethat is greater than or equal to a predetermined fourth transmissionratio R4. The predetermined fourth transmission ratio R4 is greater thanthe minimum transmission ratio R of the transmission ratio R that ischangeable by the derailleur 22.

Preferably, in configuration (A6), the controller 72 is configured tocontrol the electric actuator 48 and drive the transmission body 20 withthe motor 24 so that the transmission ratio R is changed in thepredetermined shifting range in at least one of a case where thederailleur 22 is actuated to change the transmission ratio R, thepredetermined condition related to pedaling is satisfied, and thevehicle speed V of the human-powered vehicle 10 is less than or equal toa predetermined sixth speed V6 and a case where the derailleur 22 isactuated to change the transmission ratio R, the predetermined conditionrelated to pedaling is satisfied, and the rotational speed N of thecrank axle 12 of the human-powered vehicle 10 is less than or equal to apredetermined third rotational speed N3.

In configuration (A6), the controller 72 can control the electricactuator 48 so that the transmission ratio R is changed in thepredetermined shifting range in at least one of a case where the road onwhich the human-powered vehicle 10 travels changes from an uphill to adownhill and a case where the vehicle speed V of the human-poweredvehicle 10 is changed from an increasing state to a decreasing state. Inconfiguration (A6), the controller 72 can control the electric actuator48 so that the transmission ratio R is changed in the predeterminedshifting range in a case where the road on which the human-poweredvehicle 10 travels changes from an uphill to a downhill and the vehiclespeed V of the human-powered vehicle 10 is changed from an increasingstate to a decreasing state.

As long as the controller 72 is configured to control the motor 24 anddrive the transmission body 20 with the motor 24 so as to increase therotational speed of the motor 24 as the difference of the firstrotational speed N1, which is calculated in correspondence with therotational speed of the wheel and the transmission ratio R, and thepredetermined rotational speed or the rotational speed in thepredetermined range increases in a case where the derailleur 22 isactuated to change the transmission ratio R and the predeterminedcondition related to pedaling is satisfied, other configurations can beomitted. In this modification, the derailleur 22 can be configured toinclude or not to include the electric actuator 48.

A process of the controller 72 for controlling the motor 24 to changethe transmission ratio R will be described with reference to FIG. 13 .In a case where the controller 72 is supplied with electric power, thecontroller 72 starts the process and proceeds to step S71 of theflowchart illustrated in FIG. 13 . Upon completion of the flowchartillustrated in FIG. 13 , the controller 72 repeats the process from stepS71 in predetermined cycles until the supply of electric power isstopped.

In step S71, the controller 72 determines whether the derailleur 22 isactuated. For example, in a case where the shifting execution conditionof the first embodiment is satisfied, the controller 72 determines thatthe derailleur 22 is actuated. Preferably, in a case where the shiftingexecution condition is satisfied and shifting is performable, thecontroller 72 determines that the derailleur 22 is actuated. Forexample, in step S71, the controller 72 executes the same process assteps S11, S12, and S10 shown in FIG. 5 of the first embodiment. In acase where an affirmative determination is made in step S11 and anaffirmative determination is made in step S10, the controller 72determines that the derailleur 22 is actuated. The controller 72 candetermine whether the derailleur 22 is actuated in correspondence withan output of a sensor that detects movement of the derailleur 22, asensor that detects movement of the Bowden cable, or a sensor thatdetects movement of the transmission operating device 92. In a casewhere the derailleur 22 is not actuated, the controller 72 ends theprocess. In a case where the derailleur 22 is actuated, the controller72 proceeds to step S72.

In step S72, the controller 72 determines whether the predeterminedcondition related to pedaling is satisfied. In a case where thepredetermined condition related to pedaling is not satisfied, thecontroller 72 ends the process. In a case where the predeterminedcondition related to pedaling is satisfied, the controller 72 proceedsto step S73.

In step S73, the controller 72 controls the motor 24 so as to increasethe rotational speed of the motor 24 as the difference of the firstrotational speed N1 and the predetermined rotational speed or therotational speed in the predetermined range increases, and then proceedsto step S74. In step S73, the controller 72 controls the motor 24 anddrives the transmission body 20 with the motor 24.

In step S74, the controller 72 determines whether shifting is completed.In a case where shifting is not completed, the controller 72 proceeds tostep S73. In a case where shifting is completed, the controller 72proceeds to step S75. In step S75, the controller 72 stops driving thetransmission body 20 with the motor 24 and ends the process.

As long as the controller 72 is configured to control the motor 24 anddrive the transmission body 20 with the motor 24 so as to change therotational speed of the motor 24 in correspondence with acceleration ofthe human-powered vehicle 10 in the traveling direction and increase therotational speed of the motor 24 as the acceleration of thehuman-powered vehicle 10 increases in a case where the derailleur 22 isactuated to change the transmission ratio R and the predeterminedcondition related to pedaling is satisfied, other configurations can beomitted. In this modification, the derailleur 22 can be configured toinclude or not to include the electric actuator 48.

A process of the controller 72 for controlling the motor 24 to changethe transmission ratio R will be described with reference to FIG. 14 .In a case where the controller 72 is supplied with electric power, thecontroller 72 starts the process and proceeds to step S81 of theflowchart illustrated in FIG. 14 . Upon completion of the flowchartillustrated in FIG. 14 , the controller 72 repeats the process from stepS81 in predetermined cycles until the supply of electric power isstopped.

In step S81, the controller 72 determines whether the derailleur 22 isactuated. In step S81, the controller 72 executes, for example, the sameprocess as step S71 shown in FIG. 13 . In a case where the derailleur 22is not actuated, the controller 72 ends the process. In a case where thederailleur 22 is actuated, the controller 72 proceeds to step S82.

In step S82, the controller 72 determines whether the predeterminedcondition related to pedaling is satisfied. In a case where thepredetermined condition related to pedaling is not satisfied, thecontroller 72 ends the process. In a case where the predeterminedcondition related to pedaling is satisfied, the controller 72 proceedsto step S83.

In step S83, the controller 72 controls the motor 24 so as to increasethe rotational speed of the motor 24 as the acceleration of thehuman-powered vehicle 10 increases, and then proceeds to step S84. Instep S83, the controller 72 controls the motor 24 and drives thetransmission body 20 with the motor 24.

In step S84, the controller 72 determines whether shifting is completed.In a case where shifting is not completed, the controller 72 proceeds tostep S83. In a case where shifting is completed, the controller 72proceeds to step S85. In step S85, the controller 72 stops driving thetransmission body 20 with the motor 24 and ends the process.

As long as the controller 72 is configured to control the motor 24 anddrive the transmission body 20 with the motor 24 to change at least oneof the rotational angle of the motor 24 and the output torque of themotor 24 in correspondence with the state of the human-powered vehicle10 in a case where the derailleur 22 is actuated to change thetransmission ratio R and the predetermined condition related to pedalingis satisfied, other configurations can be omitted. In this modification,the derailleur 22 can be configured to include or not to include theelectric actuator 48.

A process of the controller 72 for controlling the motor 24 to changethe transmission ratio R will be described with reference to FIG. 15 .In a case where the controller 72 is supplied with electric power, thecontroller 72 starts the process and proceeds to step S91 of theflowchart illustrated in FIG. 15 . Upon completion of the flowchartillustrated in FIG. 15 , the controller 72 repeats the process from stepS91 in predetermined cycles until the supply of electric power isstopped.

In step S91, the controller 72 determines whether the derailleur 22 isactuated. In step S91, the controller 72 executes, for example, the sameprocess as step S71 shown in FIG. 13 . In a case where the derailleur 22is not actuated, the controller 72 ends the process. In a case where thederailleur 22 is actuated, the controller 72 proceeds to step S92.

In step S92, the controller 72 determines whether the predeterminedcondition related to pedaling is satisfied. In a case where thepredetermined condition related to pedaling is not satisfied, thecontroller 72 ends the process. In a case where the predeterminedcondition related to pedaling is satisfied, the controller 72 proceedsto step S93.

In step S93, the controller 72 controls the motor 24 to change at leastone of the rotational speed of the motor 24 and the output torque of themotor 24 in correspondence with the state of the human-powered vehicle10 and then proceeds to step S84. In step S93, the controller 72controls the motor 24 and drives the transmission body 20 with the motor24. In step S93, in a first example, the state of the human-poweredvehicle 10 includes the rotational speed of the wheel 16 and thetransmission ratio R. The controller 72 is configured to control themotor 24 to increase at least one of the rotational speed and the outputtorque of the motor 24 as the difference of the first rotational speedN1 and the predetermined rotational speed or the rotational speed in thepredetermined range increases.

In step S93, in a second example, the state of the human-powered vehicle10 includes a change in the vehicle speed V of the human-powered vehicle10 or a change in the rotational speed of the wheel 16. The controller72 is configured to control the motor 24 to increase at least one of therotational speed and the output torque of the motor 24 as theacceleration or deceleration of the human-powered vehicle 10 increasesin a traveling direction or the acceleration or deceleration of therotational speed of the wheel 16 increases in a rotational directioncorresponding to the traveling direction of the human-powered vehicle10.

In step S94, the controller 72 determines whether shifting is completed.In a case where shifting is not completed, the controller 72 proceeds tostep S93. In a case where shifting is completed, the controller 72proceeds to step S95. In step S95, the controller 72 stops driving thetransmission body 20 with the motor 24 and ends the process.

As long as the controller 72 is configured to control the motor 24 anddrive the transmission body 20 with the motor 24 in a case where thederailleur 22 is actuated to change the transmission ratio R and thepredetermined condition related to pedaling is satisfied, and isconfigured to control the motor 24 so as not to drive the transmissionbody 20 if the first operating device 44 is operated even in a casewhere the derailleur 22 is actuated to change the transmission ratio Rand the predetermined condition related to pedaling is satisfied, otherconfigurations can be omitted. In this modification, the derailleur 22can be configured to include or not to include the electric actuator 48.

A process of the controller 72 for controlling the motor 24 to changethe transmission ratio R will be described with reference to FIG. 16 .In a case where the controller 72 is supplied with electric power, thecontroller 72 starts the process and proceeds to step S101 of theflowchart illustrated in FIG. 16 . Upon completion of the flowchartillustrated in FIG. 16 , the controller 72 repeats the process from stepS101 in predetermined cycles until the supply of electric power isstopped.

In step S101, the controller 72 determines whether the derailleur 22 isactuated. In step S101, the controller 72 executes, for example, thesame process as step S71 shown in FIG. 13 . In a case where thederailleur 22 is not actuated, the controller 72 ends the process. In acase where the derailleur 22 is actuated, the controller 72 proceeds tostep S102.

In step S102, the controller 72 determines whether the predeterminedcondition related to pedaling is satisfied. In a case where thepredetermined condition related to pedaling is not satisfied, thecontroller 72 ends the process. In a case where the predeterminedcondition related to pedaling is satisfied, the controller 72 proceedsto step S103.

In step S103, the controller 72 determines whether the first operatingdevice 44 is operated. In a case where the first operating device 44 isoperated, the controller 72 ends the process. In a case where the firstoperating device 44 is not operated, the controller 72 proceeds to stepS104.

In step S104, the controller 72 controls the motor 24 and drives thetransmission body 20 with the motor 24 and then proceeds to step S105.

In step S105, the controller 72 determines whether shifting iscompleted. In a case where shifting is not completed, the controller 72proceeds to step S104. In a case where shifting is completed, thecontroller 72 proceeds to step S106. In step S106, the controller 72stops driving the transmission body 20 with the motor 24 and ends theprocess.

As long as the controller 72 is configured to control the motor 24 anddrive the transmission body 20 with the motor 24 in a case where thederailleur 22 is actuated to change the transmission ratio R and thepredetermined condition related to pedaling is satisfied, and stopdriving the transmission body 20 with the motor 24 in correspondencewith the load L of the motor 24, other configurations can be omitted. Inthis modification, the derailleur 22 can be configured to include or notto include the electric actuator 48.

A process of the controller 72 for controlling the motor 24 to changethe transmission ratio R will be described with reference to FIG. 17 .In a case where the controller 72 is supplied with electric power, thecontroller 72 starts the process and proceeds to step S111 of theflowchart illustrated in FIG. 17 . Upon completion of the flowchartillustrated in FIG. 17 , the controller 72 repeats the process from stepS111 in predetermined cycles until the supply of electric power isstopped.

In step S111, the controller 72 determines whether the derailleur 22 isactuated. In step S111, the controller 72 executes, for example, thesame process as step S71 shown in FIG. 13 . In a case where thederailleur 22 is not actuated, the controller 72 ends the process. In acase where the derailleur 22 is actuated, the controller 72 proceeds tostep S112.

In step S112, the controller 72 determines whether the predeterminedcondition related to pedaling is satisfied. In a case where thepredetermined condition related to pedaling is not satisfied, thecontroller 72 ends the process. In a case where the predeterminedcondition related to pedaling is satisfied, the controller 72 proceedsto step S113.

In step S113, the controller 72 controls the motor 24 and drives thetransmission body 20 with the motor 24 and then proceeds to step S114.In step S114, the controller 72 determines whether the load L of themotor 24 is greater than or equal to the predetermined load L1. In acase where the load L of the motor 24 is greater than or equal to thepredetermined load L1, the controller 72 proceeds to step S116. In acase where the load L of the motor 24 is not greater than or equal tothe predetermined load L1, the controller 72 proceeds to step S115.

In step S115, the controller 72 determines whether shifting iscompleted. In a case where shifting is not completed, the controller 72proceeds to step S114. In a case where shifting is completed, thecontroller 72 proceeds to step S116. In step S116, the controller 72stops driving the transmission body 20 with the motor 24 and ends theprocess.

As long as the controller 72 is configured to control the motor 24 anddrive the transmission body 20 with the motor 24 in a case where thederailleur 22 is actuated to change the transmission ratio R and thepredetermined condition related to pedaling is satisfied, and stopdriving the transmission body 20 in a case where the vehicle speed V ofthe human-powered vehicle 10 becomes less than or equal to the firstspeed V1 or the rotational speed of the wheel 16 becomes less than orequal to a predetermined rotational speed, other configurations can beomitted. In this modification, the derailleur 22 can be configured toinclude or not to include the electric actuator 48.

A process of the controller 72 for controlling the motor 24 to changethe transmission ratio R will be described with reference to FIG. 18 .In a case where the controller 72 is supplied with electric power, thecontroller 72 starts the process and proceeds to step S121 of theflowchart illustrated in FIG. 18 . Upon completion of the flowchartillustrated in FIG. 18 , the controller 72 repeats the process from stepS121 in predetermined cycles until the supply of electric power isstopped.

In step S121, the controller 72 determines whether the derailleur 22 isactuated. In step S121, the controller 72 executes, for example, thesame process as step S71 shown in FIG. 13 . In a case where thederailleur 22 is not actuated, the controller 72 ends the process. In acase where the derailleur 22 is actuated, the controller 72 proceeds tostep S122.

In step S122, the controller 72 determines whether the predeterminedcondition related to pedaling is satisfied. In a case where thepredetermined condition related to pedaling is not satisfied, thecontroller 72 ends the process. In a case where the predeterminedcondition related to pedaling is satisfied, the controller 72 proceedsto step S123.

In step S123, the controller 72 controls the motor 24 and drives thetransmission body 20 with the motor 24 and then proceeds to step S124.In step S124, the controller 72 determines whether the vehicle speed Vis less than or equal to the first speed V1 or the rotational speed ofthe wheel 16 is less than or equal to the predetermined rotationalspeed. In a case where the load of the motor 24 is greater than or equalto the predetermined load, the controller 72 proceeds to step S126. In acase where the vehicle speed V is not less than or equal to the firstspeed V1 and the rotational speed of the wheel 16 is not less than orequal to the predetermined rotational speed, the controller 72 proceedsto step S125. In step S124, the controller 72 can proceed to step S126in a case where the vehicle speed V is less than or equal to the firstspeed V1 and the rotational speed of the wheel 16 is less than or equalto the predetermined rotational speed.

In step S125, the controller 72 determines whether shifting iscompleted. In a case where shifting is not completed, the controller 72proceeds to step S124. In a case where shifting is completed, thecontroller 72 proceeds to step S126. In step S126, the controller 72stops driving the transmission body 20 with the motor 24 and ends theprocess.

As long as the controller 72 is configured to control the electricactuator 48 and drive the transmission body 20 with the motor 24 so thatthe transmission ratio R is changed only in one of the increasingdirection and the decreasing direction in a case where the derailleur 22is actuated to change the transmission ratio R and the predeterminedcondition related to pedaling is satisfied, other configurations can beomitted. In this modification, the derailleur 22 includes the electricactuator 48.

A process of the controller 72 for controlling the motor 24 and theelectric actuator 48 to change the transmission ratio R will bedescribed with reference to FIG. 19 . In a case where the controller 72is supplied with electric power, the controller 72 starts the processand proceeds to step S131 of the flowchart illustrated in FIG. 19 . Uponcompletion of the flowchart illustrated in FIG. 19 , the controller 72repeats the process from step S131 in predetermined cycles until thesupply of electric power is stopped.

In step S131, the controller 72 determines whether the derailleur 22 isactuated. For example, in a case where the shifting execution conditionof the first embodiment is satisfied, the controller 72 determines thatthe derailleur 22 is actuated. Preferably, in a case where the shiftingexecution condition is satisfied and shifting is performable, thecontroller 72 determines that the derailleur 22 is actuated. Forexample, in step S131, the controller 72 executes the same process assteps S11, S12, and S10 shown in FIG. 5 of the first embodiment. In acase where an affirmative determination is made in step S11 and anaffirmative determination is made in step S10, the controller 72determines that the derailleur 22 is actuated. In a case where thederailleur 22 is not actuated, the controller 72 ends the process. In acase where the derailleur 22 is actuated, the controller 72 proceeds tostep S132.

In step S132, the controller 72 determines whether the predeterminedcondition related to pedaling is satisfied. In a case where thepredetermined condition related to pedaling is not satisfied, thecontroller 72 ends the process. In a case where the predeterminedcondition related to pedaling is satisfied, the controller 72 proceedsto step S133.

In step S133, the controller 72 controls the electric actuator 48 anddrives the transmission body 20 with the motor 24 so that thetransmission ratio R is changed only in one of the increasing directionand the decreasing direction, and then proceeds to step S134.

In step S134, the controller 72 determines whether shifting iscompleted. In a case where shifting is not completed, the controller 72proceeds to step S133. In a case where shifting is completed, thecontroller 72 proceeds to step S135. In step S135, the controller 72stops driving the transmission body 20 with the motor 24 and ends theprocess.

As long as the controller 72 is configured to control the electricactuator 48 to change the transmission ratio R in the predeterminedshifting range and configured to drive the transmission body 20 with themotor 24 in a case where the derailleur 22 is actuated to change thetransmission ratio R and the predetermined condition related to pedalingis satisfied, other configurations can be omitted. In this modification,the derailleur 22 includes the electric actuator 48.

A process of the controller 72 for controlling the motor 24 and theelectric actuator 48 to change the transmission ratio R will bedescribed with reference to FIG. 20 . In a case where the controller 72is supplied with electric power, the controller 72 starts the processand proceeds to step S141 of the flowchart illustrated in FIG. 20 . Uponcompletion of the flowchart illustrated in FIG. 20 , the controller 72repeats the process from step S141 in predetermined cycles until thesupply of electric power is stopped.

In step S141, the controller 72 determines whether the derailleur 22 isactuated. In step S141, the controller 72 executes, for example, thesame process as step S131 shown in FIG. 19 . In a case where thederailleur 22 is not actuated, the controller 72 ends the process. In acase where the derailleur 22 is actuated, the controller 72 proceeds tostep S142.

In step S142, the controller 72 determines whether the predeterminedcondition related to pedaling is satisfied. In a case where thepredetermined condition related to pedaling is not satisfied, thecontroller 72 ends the process. In a case where the predeterminedcondition related to pedaling is satisfied, the controller 72 proceedsto step S143.

In step S143, the controller 72 controls the electric actuator 48 anddrives the transmission body 20 with the motor 24 so that thetransmission ratio R is changed in the predetermined shifting range, andthen proceeds to step S144.

In step S144, the controller 72 determines whether shifting iscompleted. In a case where shifting is not completed, the controller 72proceeds to step S143. In a case where shifting is completed, thecontroller 72 proceeds to step S145. In step S145, the controller 72stops driving the transmission body 20 with the motor 24 and ends theprocess.

As long as the controller 72 is configured to be switchable between thefirst shifting mode, which controls the electric actuator 48 inaccordance with the state of the human-powered vehicle 10, and thesecond shifting mode, which controls the electric actuator 48 inaccordance with operation of the transmission operating device providedon the human-powered vehicle 10, configured to be switchable between thethird mode and the fourth mode in the first shifting mode, andconfigured in the third mode to control the motor 24 and drive thetransmission body 20 in accordance with the state of the human-poweredvehicle 10 in a case where the derailleur 22 is actuated to change thetransmission ratio R and the predetermined condition related to pedalingis satisfied, and configured in the fourth mode to control the motor 24so as not to drive the transmission body 20 even in a case where thederailleur 22 is actuated to change the transmission ratio R and thepredetermined condition related to pedaling is satisfied, otherconfigurations can be omitted. In this modification, the derailleur 22includes the electric actuator 48.

A process of the controller 72 for controlling the motor 24 to changethe transmission ratio R will be described with reference to FIG. 21 .In a case where the controller 72 is supplied with electric power, thecontroller 72 starts the process and proceeds to step S151 of theflowchart illustrated in FIG. 21 . Upon completion of the flowchartillustrated in FIG. 21 , the controller 72 repeats the process from stepS151 in predetermined cycles until the supply of electric power isstopped.

In step S151, the controller 72 determines whether the derailleur 22 isactuated. In step S151, the controller 72 executes, for example, thesame process as step S71 shown in FIG. 13 . In a case where thederailleur 22 is not actuated, the controller 72 ends the process. In acase where the derailleur 22 is actuated, the controller 72 proceeds tostep S152.

In step S152, the controller 72 determines whether the predeterminedcondition related to pedaling is satisfied. In a case where thepredetermined condition related to pedaling is not satisfied, thecontroller 72 ends the process. In a case where the predeterminedcondition related to pedaling is satisfied, the controller 72 proceedsto step S153. In step S153, the controller 72 determines whether thefirst shifting mode is the fourth mode. In a case where the firstshifting mode is the fourth mode, the controller 72 ends the process. Ina case where the first shifting mode is not the fourth mode, thecontroller 72 proceeds to step S154. In step S154, the controller 72controls the motor 24 and drives the transmission body 20 with the motor24 and then proceeds to step S155.

In step S155, the controller 72 determines whether shifting iscompleted. In a case where shifting is not completed, the controller 72proceeds to step S154. In a case where shifting is completed, thecontroller 72 proceeds to step S156. In step S156, the controller 72stops driving the transmission body 20 with the motor 24 and ends theprocess.

The controller 72 can control the electric actuator 48 using a processdifferent from the flowchart illustrated in FIG. 21 or can control theelectric actuator 48 using the flowchart illustrated in FIG. 21 . Forexample, in step S154, the electric actuator 48 is controlled.

As long as the controller 72 is configured to control the electricactuator 48 and the motor 24 so that the first rotational speed N1,which is calculated in correspondence with the rotational speed of thewheel 16 and the transmission ratio R, is included in the predeterminedrange, configured to drive the transmission body 20 with the motor 24 ina case where the derailleur 22 is actuated to change the transmissionratio R and the predetermined condition related to pedaling issatisfied, and configured to control the electric actuator 48 so thatamong a plurality of shift stages of the derailleur 22, the transmissionratio R is set to be in the largest shift stage in a case where thefirst rotational speed N1 is included in the predetermined range, otherconfigurations can be omitted. In this modification, the derailleur 22includes the electric actuator 48.

A process of the controller 72 for controlling the motor 24 and theelectric actuator 48 to change the transmission ratio R will bedescribed with reference to FIG. 22 . In a case where the controller 72is supplied with electric power, the controller 72 starts the processand proceeds to step S161 of the flowchart illustrated in FIG. 22 . Uponcompletion of the flowchart illustrated in FIG. 22 , the controller 72repeats the process from step S161 in predetermined cycles until thesupply of electric power is stopped.

In step S161, the controller 72 determines whether the derailleur 22 isactuated. In step S161, the controller 72 executes, for example, thesame process as step S131 shown in FIG. 19 . In a case where thederailleur 22 is not actuated, the controller 72 ends the process. In acase where the derailleur 22 is actuated, the controller 72 proceeds tostep S162.

In step S162, the controller 72 determines whether the predeterminedcondition related to pedaling is satisfied. In a case where thepredetermined condition related to pedaling is not satisfied, thecontroller 72 ends the process. In a case where the predeterminedcondition related to pedaling is satisfied, the controller 72 proceedsto step S163.

In step S163, the controller 72 determines whether the first rotationalspeed N1 is included in the predetermined range. In a case where thefirst rotational speed N1 is included in the predetermined range, thecontroller 72 proceeds to step S164. In step S164, the controller 72controls the electric actuator 48 and the motor 24 so that among aplurality of shift stages, the transmission ratio R is set to be in thelargest shift stage, and then proceeds to step S166. In step S164, thecontroller 72 controls the motor 24 and drives the transmission body 20with the motor 24.

In step S163, in a case where the first rotational speed N1 is notincluded in the predetermined range, the controller 72 proceeds to stepS165. In step S165, the controller 72 controls the electric actuator 48and the motor 24 so that the first rotational speed N1 is included inthe predetermined range, and proceeds to step S166. In step S165, thecontroller 72 controls the motor 24 and drives the transmission body 20with the motor 24.

In step S166, the controller 72 determines whether shifting iscompleted. In a case where shifting is not completed, the controller 72again executes S166. In a case where shifting is completed, thecontroller 72 proceeds to step S167. In step S167, the controller 72stops driving the transmission body 20 with the motor 24 and ends theprocess.

As long as the controller 72 is configured to control the motor 24 anddrive the transmission body 20 with the motor 24 in a case where thederailleur 22 is actuated to change the transmission ratio R and apredetermined condition related to pedaling is satisfied, and configuredto control the electric actuator 48 so as not to increase thetransmission ratio R in a case where the vehicle speed V of thehuman-powered vehicle 10 is greater than or equal to the second speed V2or the rotational speed of the wheel 16 is greater than or equal to thepredetermined rotational speed, other configurations can be omitted. Inthis modification, the derailleur 22 includes the electric actuator 48.

A process of the controller 72 for controlling the motor 24 and theelectric actuator 48 to change the transmission ratio R will bedescribed with reference to FIG. 23 . In a case where the controller 72is supplied with electric power, the controller 72 starts the processand proceeds to step S171 of the flowchart illustrated in FIG. 23 . Uponcompletion of the flowchart illustrated in FIG. 23 , the controller 72repeats the process from step S171 in predetermined cycles until thesupply of electric power is stopped.

In step S171, the controller 72 determines whether the derailleur 22 isactuated. In step S171, the controller 72 executes, for example, thesame process as step S131 shown in FIG. 19 . In a case where thederailleur 22 is not actuated, the controller 72 ends the process. In acase where the derailleur 22 is actuated, the controller 72 proceeds tostep S172.

In step S172, the controller 72 determines whether the predeterminedcondition related to pedaling is satisfied. In a case where thepredetermined condition related to pedaling is not satisfied, thecontroller 72 ends the process. In a case where the predeterminedcondition related to pedaling is satisfied, the controller 72 proceedsto step S173.

In step S173, the controller 72 determines whether the vehicle speed Vis greater than or equal to the second speed V2 or the rotational speedof the wheel 16 is greater than or equal to the predetermined rotationalspeed. In a case where the vehicle speed V is greater than or equal tothe second speed V2 or the rotational speed of the wheel 16 is greaterthan or equal to the predetermined rotational speed, the controller 72proceeds to step S174. In step S174, the controller 72 controls theelectric actuator 48 and the motor 24 so as not to increase thetransmission ratio R, and then proceeds to step S176. In step S174, thecontroller 72 controls the motor 24 and drives the transmission body 20with the motor 24. In step S174, the controller 72 controls the electricactuator 48 to decrease the transmission ratio R. In step S173, thecontroller 72 can proceed to step S174 in a case where the vehicle speedV is greater than or equal to the second speed V2 and the rotationalspeed of the wheel 16 is greater than or equal to the predeterminedrotational speed.

In step S173, in a case where the vehicle speed V is not greater than orequal to the second speed V2 and the rotational speed of the wheel 16 isnot greater than or equal to the predetermined rotational speed, thecontroller 72 proceeds to step S175. In step S175, the controller 72controls the electric actuator 48 and the motor 24 to change thetransmission ratio R and proceeds to step S176. In step S175, thecontroller 72 controls the motor 24 and drives the transmission body 20with the motor 24.

In step S176, the controller 72 determines whether shifting iscompleted. In a case where shifting is not completed, the controller 72again executes S176. In a case where shifting is completed, thecontroller 72 proceeds to step S177. In step S177, the controller 72stops driving the transmission body 20 with the motor 24 and ends theprocess.

In steps S174 and S175, the controller 72 can set the targettransmission ratio R. In a case where the derailleur 22 is actuated, thecontroller 72 can set the target transmission ratio R in anotherprocess, and in step S174, in a case where the target transmission ratioR is greater than the present transmission ratio R, the controller 72can change the target transmission ratio R to be less than or equal tothe present transmission ratio R. In a case where the derailleur 22 isactuated, the controller 72 can set the target transmission ratio R inanother process, and in step S174, in a case where the targettransmission ratio R is greater than the present transmission ratio R,the controller 72 can be configured not to change the transmission ratioR.

As long as the controller 72 is configured to control the motor 24 anddrive the transmission body 20 in a case where the derailleur 22 isactuated by the electric actuator 48 to change the transmission ratio Rand the predetermined condition related to pedaling is satisfied, and isconfigured to control the electric actuator 48 so as not to change thetransmission ratio R until the first condition related to shifting issatisfied in a case where the derailleur 22 is actuated, otherconfigurations can be omitted. In this modification, the derailleur 22includes the electric actuator 48.

A process of the controller 72 for controlling the motor 24 and theelectric actuator 48 to change the transmission ratio R will bedescribed with reference to FIG. 24 . In a case where the controller 72is supplied with electric power, the controller 72 starts the processand proceeds to step S181 of the flowchart illustrated in FIG. 24 . Uponcompletion of the flowchart illustrated in FIG. 24 , the controller 72repeats the process from step S181 in predetermined cycles until thesupply of electric power is stopped.

In step S181, the controller 72 determines whether the derailleur 22 isactuated. In step S181, the controller 72 executes, for example, thesame process as step S131 shown in FIG. 19 . In a case where thederailleur 22 is not actuated, the controller 72 ends the process. In acase where the derailleur 22 is actuated, the controller 72 proceeds tostep S182.

In step S182, the controller 72 determines whether the predeterminedcondition related to pedaling is satisfied. In a case where thepredetermined condition related to pedaling is not satisfied, thecontroller 72 ends the process. In a case where the predeterminedcondition related to pedaling is satisfied, the controller 72 proceedsto step S183.

In step S183, the controller 72 determines whether the first conditionrelated to shifting is satisfied. In a case where the first conditionrelated to shifting is not satisfied, the controller 72 again executesstep S183. In a case where the first condition related to shifting issatisfied, the controller 72 proceeds to step S184.

In step S184, the controller 72 controls the electric actuator 48 andthe motor 24 to change the transmission ratio R and proceeds to stepS185. In step S184, the controller 72 controls the motor 24 and drivesthe transmission body 20 with the motor 24.

In step S185, the controller 72 determines whether shifting iscompleted. In a case where shifting is not completed, the controller 72again executes S185. In a case where shifting is completed, thecontroller 72 proceeds to step S186. In step S186, the controller 72stops driving the transmission body 20 with the motor 24 and ends theprocess.

As long as the controller 72 is configured to control the motor 24 anddrive the transmission body 20 in a case where the derailleur 22 isactuated by the electric actuator 48 to change the transmission ratio Rand the predetermined condition related to pedaling is satisfied, andconfigured to control the electric actuator 48 so as not to change thetransmission ratio R with the derailleur 22 until a second conditionrelated to shifting is satisfied in a case where the electric actuator48 and the motor 24 are controlled to increase or decrease thetransmission ratio R a predetermined number of times or more within thepredetermined third time T3, other configurations can be omitted. Inthis modification, the derailleur 22 includes the electric actuator 48.

A process of the controller 72 for controlling the motor 24 and theelectric actuator 48 to change the transmission ratio R will bedescribed with reference to FIG. 25 . In a case where the controller 72is supplied with electric power, the controller 72 starts the processand proceeds to step S191 of the flowchart illustrated in FIG. 25 . Uponcompletion of the flowchart illustrated in FIG. 25 , the controller 72repeats the process from step S191 in predetermined cycles until thesupply of electric power is stopped.

In step S191, the controller 72 determines whether the derailleur 22 isactuated. In step S191, the controller 72 executes, for example, thesame process as step S131 shown in FIG. 19 . In a case where thederailleur 22 is not actuated, the controller 72 ends the process. In acase where the derailleur 22 is actuated, the controller 72 proceeds tostep S192.

In step S192, the controller 72 determines whether the predeterminedcondition related to pedaling is satisfied. In a case where thepredetermined condition related to pedaling is not satisfied, thecontroller 72 ends the process. In a case where the predeterminedcondition related to pedaling is satisfied, the controller 72 proceedsto step S193.

In step S193, the controller 72 determines whether the electric actuator48 and the motor 24 are controlled so that the transmission ratio R isincreased or decreased a predetermined number of times or more withinthe predetermined third time T3. In a case where the electric actuator48 and the motor 24 are controlled so that the transmission ratio R isincreased or decreased a predetermined number of times or more withinthe predetermined third time T3, the controller 72 proceeds to stepS194. In a case where the electric actuator 48 and the motor 24 are notcontrolled so that the transmission ratio R is increased or decreased apredetermined number of times or more within the predetermined thirdtime T3, the controller 72 proceeds to step S195.

In step S194, the controller 72 determines whether the second conditionrelated to shifting is satisfied. In a case where the second conditionrelated to shifting is not satisfied, the controller 72 ends theprocess. In a case where the second condition related to shifting issatisfied, the controller 72 proceeds to step S195.

In step S195, the controller 72 controls the electric actuator 48 andthe motor 24 to change the transmission ratio R and proceeds to stepS196. In step S195, the controller 72 controls the motor 24 and drivesthe transmission body 20 with the motor 24.

In step S196, the controller 72 determines whether shifting iscompleted. In a case where shifting is not completed, the controller 72again executes S196. In a case where shifting is completed, thecontroller 72 proceeds to step S197. In step S197, the controller 72stops driving the transmission body 20 with the motor 24 and ends theprocess.

As long as the controller 72 is configured to control the electricactuator 48 and the motor 24 so that relative movement of the derailleur22 and at least one of the first rotational body and the secondrotational body is started at the same time as the motor 24 is driven orbefore the motor 24 is driven in a case where the electric actuator 48and the motor 24 are controlled to change the transmission ratio R andthe predetermined condition related to pedaling is satisfied, otherconfigurations can be omitted. In this modification, the derailleur 22includes the electric actuator 48.

A process of the controller 72 for controlling the motor 24 and theelectric actuator 48 to change the transmission ratio R will bedescribed with reference to FIG. 26 . In a case where the controller 72is supplied with electric power, the controller 72 starts the processand proceeds to step S201 of the flowchart illustrated in FIG. 26 . Uponcompletion of the flowchart illustrated in FIG. 26 , the controller 72repeats the process from step S201 in predetermined cycles until thesupply of electric power is stopped.

In step S201, the controller 72 determines whether the derailleur 22 isactuated. In step S201, the controller 72 executes, for example, thesame process as step S131 shown in FIG. 19 . In a case where thederailleur 22 is not actuated, the controller 72 ends the process. In acase where the derailleur 22 is actuated, the controller 72 proceeds tostep S202.

In step S202, the controller 72 determines whether the predeterminedcondition related to pedaling is satisfied. In a case where thepredetermined condition related to pedaling is not satisfied, thecontroller 72 ends the process. In a case where the predeterminedcondition related to pedaling is satisfied, the controller 72 proceedsto step S203.

In step S203, the controller 72 controls the electric actuator 48 andthe motor 24 so that relative movement of the derailleur 22 and at leastone of the first rotational body 14 and the second rotational body 18 isstarted at the same time as the motor 24 is driven or before the motor24 is driven, and then proceeds to step S204. In step S203, thecontroller 72 controls the motor 24 and drives the transmission body 20with the motor 24.

In step S204, the controller 72 determines whether shifting iscompleted. In a case where shifting is not completed, the controller 72proceeds to step S203. In a case where shifting is completed, thecontroller 72 proceeds to step S205. In step S205, the controller 72stops driving the transmission body 20 with the motor 24 and ends theprocess.

As long as the controller 72 is configured to control the motor 24 anddrive the transmission body 20 with the motor 24 in a case where thederailleur 22 is actuated to change the transmission ratio R and thepredetermined condition related to pedaling is satisfied, configured tocontrol the electric actuator 48 so that the shift stage of thederailleur 22 approaches the predetermined shift stage or thetransmission ratio R approaches a predetermined transmission ratio R ina case where the human-powered vehicle 10 is decelerated, configured tocontrol the electric actuator 48 and change the shift stage of thederailleur 22 one stage at a time in a case where the difference of thepredetermined shift stage and the present shift stage of the derailleur22 or the difference of the predetermined transmission ratio R and thepresent transmission ratio R is less than or equal to the predeterminedvalue, and configured to control the electric actuator 48 so as tocontinuously actuate the derailleur 22 over a plurality of shift stagesin a case where the difference of the predetermined shift stage and thepresent shift stage of the derailleur 22 or the difference of thepredetermined transmission ratio R and the present transmission ratio Rexceeds the predetermined value, other configurations can be omitted. Inthis modification, the derailleur 22 includes the electric actuator 48.

A process of the controller 72 for controlling the motor 24 and theelectric actuator 48 to change the transmission ratio R will bedescribed with reference to FIG. 27 . In a case where the controller 72is supplied with electric power, the controller 72 starts the processand proceeds to step S211 of the flowchart illustrated in FIG. 27 . Uponcompletion of the flowchart illustrated in FIG. 27 , the controller 72repeats the process from step S211 in predetermined cycles until thesupply of electric power is stopped.

In step S211, the controller 72 determines whether the derailleur 22 isactuated. In step S211, the controller 72 executes, for example, thesame process as step S131 shown in FIG. 19 . In a case where thederailleur 22 is not actuated, the controller 72 ends the process. In acase where the derailleur 22 is actuated, the controller 72 proceeds tostep S212.

In step S212, the controller 72 determines whether the predeterminedcondition related to pedaling is satisfied. In a case where thepredetermined condition related to pedaling is not satisfied, thecontroller 72 ends the process. In a case where the predeterminedcondition related to pedaling is satisfied, the controller 72 proceedsto step S213.

In step S213, the controller 72 determines whether the human-poweredvehicle 10 is decelerated. In a case where the human-powered vehicle 10is not decelerated, the controller 72 ends the process. In a case wherethe human-powered vehicle 10 is decelerated, the controller 72 proceedsto step S214.

In step S214, the controller 72 determines whether the difference of thepredetermined shift stage and the present shift stage of the derailleur22 or the difference of the predetermined transmission ratio R and thepresent transmission ratio R is less than or equal to the predeterminedvalue. In a case where the difference of the predetermined shift stageand the present shift stage of the derailleur 22 or the difference ofthe predetermined transmission ratio R and the present transmissionratio R is less than or equal to the predetermined value, the controller72 proceeds to step S215. In a case where the difference of thepredetermined shift stage and the present shift stage of the derailleur22 or the difference of the predetermined transmission ratio R and thepresent transmission ratio R is not less than or equal to thepredetermined value, the controller 72 proceeds to step S216.

In step S215, the controller 72 controls the motor 24 to drive thetransmission body 20 with the motor 24 and controls the electricactuator 48 to change the shift stage of the derailleur 22 one stage ata time, and proceeds to step S217.

In step S216, the controller 72 controls the motor 24 to drive thetransmission body 20 with the motor 24 and controls the electricactuator 48 to continuously actuate the derailleur 22 over a pluralityof shift stages, and proceeds to step S217.

In step S217, the controller 72 determines whether shifting iscompleted. In a case where shifting is not completed, the controller 72proceeds to step S214. In a case where shifting is completed, thecontroller 72 proceeds to step S218. In step S218, the controller 72stops driving the transmission body 20 with the motor 24 and ends theprocess.

As long as the controller 72 is configured to control the motor 24 anddrive the transmission body 20 with the motor 24 in a case where thederailleur 22 is actuated to change the transmission ratio R and thepredetermined condition related to pedaling is satisfied, and configuredto control the electric actuator 48 so that the fifth time T5 duringwhich the derailleur 22 is actuated over a plurality of shift stages ina case where the vehicle speed V of the human-powered vehicle 10 is lessthan or equal to the predetermined fifth speed V5 becomes shorter thanthe sixth time T6 during which the derailleur 22 is actuated over aplurality of shift stages in a case where the vehicle speed V of thehuman-powered vehicle 10 exceeds the predetermined fifth speed V5, otherconfigurations can be omitted. In this modification, the derailleur 22includes the electric actuator 48.

A process of the controller 72 for controlling the motor 24 and theelectric actuator 48 to change the transmission ratio R will bedescribed with reference to FIG. 28 . In a case where the controller 72is supplied with electric power, the controller 72 starts the processand proceeds to step S221 of the flowchart illustrated in FIG. 28 . Uponcompletion of the flowchart illustrated in FIG. 28 , the controller 72repeats the process from step S221 in predetermined cycles until thesupply of electric power is stopped.

In step S221, the controller 72 determines whether the derailleur 22 isactuated. In step S221, the controller 72 executes, for example, thesame process as step S131 shown in FIG. 19 . In a case where thederailleur 22 is not actuated, the controller 72 ends the process. In acase where the derailleur 22 is actuated, the controller 72 proceeds tostep S222.

In step S222, the controller 72 determines whether the predeterminedcondition related to pedaling is satisfied. In a case where thepredetermined condition related to pedaling is not satisfied, thecontroller 72 ends the process. In a case where the predeterminedcondition related to pedaling is satisfied, the controller 72 proceedsto step S223.

In step S223, the controller 72 determines whether the vehicle speed Vof the human-powered vehicle 10 is less than or equal to thepredetermined fifth speed V5. In a case where the vehicle speed V of thehuman-powered vehicle 10 is less than or equal to the predeterminedfifth speed V5, the controller 72 proceeds to step S224. In a case wherethe vehicle speed V of the human-powered vehicle 10 is not less than orequal to the predetermined fifth speed V5, the controller 72 proceeds tostep S225.

In step S224, the controller 72 controls the motor 24 to drive thetransmission body 20 with the motor 24 and controls the electricactuator 48 so that the fifth time T5 becomes shorter than the sixthtime T6, and proceeds to step S226.

In step S225, the controller 72 controls the motor 24 to drive thetransmission body 20 with the motor 24 and controls the electricactuator 48, and proceeds to step S226.

In step S226, the controller 72 determines whether shifting iscompleted. In a case where shifting is not completed, the controller 72proceeds to step S223. In a case where shifting is completed, thecontroller 72 proceeds to step S227. In step S227, the controller 72stops driving the transmission body 20 with the motor 24 and ends theprocess.

In the first embodiment, the second embodiment, a modification of thefirst embodiment, or a modification of the second embodiment, at leastone of steps S16, S20, and S30 can be omitted from FIG. 5 . In a casewhere at least one of steps S16, S20, and S30 is omitted from FIG. 5 ,the configuration corresponding the omitted step can be omitted from thecontroller 72. In a case where step S16 is omitted from FIG. 5 , thecontroller 72 executes step S15 and then proceeds to step S17. In a casewhere a negative determination is made in step S17, the controller 72repeats step S17. In a case where step S20 is omitted from FIG. 5 and anaffirmative determination is made in step S13, the controller 72proceeds to step S30. In a case where step S30 is omitted from FIG. 5and an affirmative determination is made in step S20, the controller 72proceeds to step S14. In a case where steps S20 and S30 are omitted fromFIG. 5 and an affirmative determination is made in step S13, thecontroller 72 proceeds to step S14. In an embodiment including the thirdembodiment or a modification of the third embodiment, at least one ofsteps S16 and S20 can be omitted from FIG. 10 . In a case where at leastone of steps S16 and S20 is omitted from FIG. 10 , the configurationcorresponding the omitted step can be omitted from the controller 72. Ina case where step S16 is omitted from FIG. 10 , the controller 72executes step S14 and then proceeds to step S57. In a case where anegative determination is made in step S57, the controller 72 repeatsstep S57. In a case where step S20 is omitted from FIG. 10 and anaffirmative determination is made in step S13, the controller 72proceeds to step S14.

In an embodiment including the first embodiment, the second embodiment,a modification of the first embodiment, a modification of the secondembodiment, the third embodiment, or a modification of the thirdembodiment, the controller 72 is not limited to configurations (A1),(A2), (A3), and (A4) and can have any configuration that controls themotor 24 to drive the transmission body 20 with the motor 24. Thecontroller 72 can control the motor 24 to drive the transmission body 20with the motor 24 using a configuration differing from configurations(A1), (A2), (A3), and (A4). The controller 72 includes the followingconfiguration (A5), (A6), or (A7) as the configuration differing fromconfigurations (A1), (A2), (A3), and (A4).

(A5) In a case of driving the transmission body 20 with the motor 24,the controller 72 is configured to control the motor 24 so that thetransmission body 20 moves at a constant speed regardless of thetransmission ratio R.

(A6) The controller 72 is configured to control the motor 24 so thatmoving speed of the transmission body 20 increases from the time ofstarting to move regardless of the transmission ratio R.

(A7) The controller 72 is configured to control the motor 24 so thatmoving speed of the transmission body 20 increases from the time ofstarting to move and then becomes constant regardless of thetransmission ratio R.

For example, in the first embodiment, the second embodiment, amodification of the first embodiment, or a modification of the secondembodiment, in step S14 shown in FIG. 5 , the controller 72 can controlthe motor 24 to drive the transmission body 20 with the motor 24 using aconfiguration differing from configurations (A1), (A2), (A3), and (A4).For example, in an embodiment including the third embodiment or amodification of the third embodiment, in step S14 shown in FIG. 10 , thecontroller 72 can control the motor 24 to drive the transmission body 20with the motor 24 using a configuration differing from configurations(A1), (A2), (A3), and (A4).

In the first embodiment, the second embodiment, a modification of thefirst embodiment, or a modification of the second embodiment, at leastone of steps S16, S20, and S30 can be omitted from FIG. 5 , and in stepS14 shown in FIG. 5 , the controller 72 can control the motor 24 todrive the transmission body 20 with the motor 24 using a configurationdiffering from configurations (A1), (A2), (A3), and (A4). In a casewhere at least one of steps S16, S20, and S30 is omitted from FIG. 5 ,the configuration corresponding the omitted step can be omitted from thecontroller 72.

In an embodiment including the third embodiment or a modification of thethird embodiment, at least one of steps S16 and S20 can be omitted fromFIG. 10 , and in step S14 shown in FIG. 10 , the controller 72 cancontrol the motor 24 to drive the transmission body 20 with the motor 24using a configuration differing from configurations (A1), (A2), (A3),and (A4). In a case where at least one of steps S16 and S20 is omittedfrom FIG. 10 , the configuration corresponding the omitted step can beomitted from the controller 72. The configuration differing fromconfigurations (A1), (A2), (A3), and (A4) can be configuration (A5),(A6), or (A7) or another configuration. In this modification, the motor24 of the power transmission system 60 is configured to drive thetransmission body 20 and generate electric power by being driven by thetransmission body 20, the power storage device 66 is configured to storethe electric power generated by the motor 24, and the control device 70is configured to control the motor 24 using electric power of the powerstorage device 66. Thus, the transmission ratio R is changed in apreferred manner.

In the first embodiment, the second embodiment, a modification of thefirst embodiment, or a modification of the second embodiment, at leastone of steps S16, S20, and S30 can be omitted from FIG. 5 . In a casewhere at least one of steps S16, S20, and S30 is omitted from FIG. 5 ,the configuration corresponding the omitted step can be omitted from thecontroller 72. In this modification, the controller 72 is configured tocontrol the electric actuator 48 so that among a plurality of shiftstages of the derailleur 22, the transmission ratio R is set to be inthe largest shift stage in a case where the first rotational speed N1 isincluded in the predetermined range. In this modification, in step S15shown in FIG. 5 , the controller 72 controls the electric actuator 48 sothat among a plurality of shift stages of the derailleur 22, thetransmission ratio R is set to be in the largest shift stage in a casewhere the first rotational speed N1 is included in the predeterminedrange. Thus, the transmission ratio R is changed in a preferred manner.

In the first embodiment, the second embodiment, a modification of thefirst embodiment, or a modification of the second embodiment, at leastone of steps S16 and S20 can be omitted from FIG. 5 . In a case where atleast one of steps S16 and S20 is omitted from FIG. 5 , theconfiguration corresponding the omitted step can be omitted from thecontroller 72. In this modification, the controller 72 is configured tocontrol the motor 24 to drive the transmission body 20 in a case wherethe derailleur 22 is actuated by the electric actuator 48 to change thetransmission ratio R and the predetermined condition related to pedalingis satisfied, and is configured to control the electric actuator 48 soas not to increase the transmission ratio R in a case where the vehiclespeed V of the human-powered vehicle 10 is greater than or equal to thesecond speed V2 or the rotational speed NW of the wheel 16 is greaterthan or equal to the predetermined rotational speed NWX. Thus, thetransmission ratio R is changed in a preferred manner. In step S30 shownin FIG. 5 , the controller 72 determines whether the vehicle speed V ofthe human-powered vehicle 10 is greater than or equal to the secondspeed V2 or the rotational speed NW of the wheel 16 is greater than orequal to the predetermined rotational speed NWX and the targettransmission ratio R is less than the present transmission ratio R. Inthis modification, the controller 72 can be configured to control theelectric actuator 48 so that the transmission ratio R does not increasein a case where the vehicle speed V of the human-powered vehicle 10 isgreater than or equal to the second speed V2 and the rotational speed NWof the wheel 16 is greater than or equal to the predetermined rotationalspeed NWX. In a case where the vehicle speed V of the human-poweredvehicle 10 is greater than or equal to the second speed V2 or therotational speed NW of the wheel 16 is greater than or equal to thepredetermined rotational speed NWX, the controller 72 does not outputthe first shifting control signal to the electric actuator 48. In stepS30 shown in FIG. 5 , the controller 72 ends the process in a case wherethe vehicle speed V of the human-powered vehicle 10 is greater than orequal to the second speed V2 or the rotational speed NW of the wheel 16is greater than or equal to the predetermined rotational speed NWX andthe shifting execution condition for increasing the transmission ratio Ris satisfied.

In the first embodiment, the second embodiment, a modification of thefirst embodiment, or a modification of the second embodiment, at leastone of steps S16 and S20 can be omitted from FIG. 5 . In a case where atleast one of steps S16 and S20 is omitted from FIG. 5 , theconfiguration corresponding the omitted step can be omitted from thecontroller 72. In this modification, the controller 72 is configured tocontrol the motor 24 and drive the transmission body 20 in a case wherethe derailleur 22 is actuated by the electric actuator 48 to change thetransmission ratio R and the predetermined condition related to pedalingis satisfied, and is configured to control the electric actuator 48 soas not to change the transmission ratio R until the first conditionrelated to shifting is satisfied in a case where the derailleur 22 isactuated. Thus, the transmission ratio R is changed in a preferredmanner. In a case where the derailleur 22 is actuated, the controller 72does not output the shifting control signal to the electric actuator 48until the first condition related to shifting is satisfied. In step S30shown in FIG. 5 , the controller 72 ends the process in a case where thederailleur 22 is actuated and the first condition related to shifting isnot satisfied.

In the first embodiment, the second embodiment, a modification of thefirst embodiment, or a modification of the second embodiment, at leastone of steps S16 and S20 can be omitted from FIG. 5 . In a case where atleast one of steps S16 and S20 is omitted from FIG. 5 , theconfiguration corresponding the omitted step can be omitted from thecontroller 72. In this modification, the controller 72 is configured tocontrol the motor 24 and drive the transmission body 20 in a case wherethe derailleur 22 is actuated by the electric actuator 48 to change thetransmission ratio R and the predetermined condition related to pedalingis satisfied, and configured to control the electric actuator 48 so asnot to change the transmission ratio R with the derailleur 22 until thesecond condition related to shifting is satisfied in a case where theelectric actuator 48 and the motor 24 are controlled to increase ordecrease the transmission ratio R a predetermined number of times ormore within the predetermined third time T3. Thus, the transmissionratio R is changed in a preferred manner.

The controller 72 does not output the shifting control signal to theelectric actuator 48 until the second condition related to shifting issatisfied in a case where the electric actuator 48 and the motor 24 arecontrolled to increase or decrease the transmission ratio R apredetermined number of times or more within the predetermined thirdtime T3. In step S30, the controller 72 ends the process in a case wherethe electric actuator 48 and the motor 24 are controlled to increase ordecrease the transmission ratio R a predetermined number of times ormore within the predetermined third time T3 and the second conditionrelated to shifting is not satisfied.

In the first embodiment, the second embodiment, a modification of thefirst embodiment, or a modification of the second embodiment, at leastone of steps S16, S20, and S30 can be omitted from FIG. 5 . In a casewhere at least one of steps S16, S20, and S30 is omitted from FIG. 5 ,the configuration corresponding the omitted step can be omitted from thecontroller 72. In this modification, the controller 72 is configured tocontrol the electric actuator 48 and the motor 24 so that relativemovement of the derailleur 22 and at least one of the first rotationalbody 14 and the second rotational body 18 is started at the same time asthe motor 24 is driven or before the motor 24 is driven in a case wherethe electric actuator 48 and the motor 24 are controlled to change thetransmission ratio R and the predetermined condition related to pedalingis satisfied. Thus, the transmission ratio R is changed in a preferredmanner. In this modification, preferably, in step S14 shown in FIG. 5 ,the controller 72 controls the motor 24 so as not to drive the motor 24until the electric actuator 48 is actuated in step S15.

In the first embodiment, the second embodiment, a modification of thefirst embodiment, or a modification of the second embodiment, at leastone of steps S16, S20, and S30 can be omitted from FIG. 5 . In a casewhere at least one of steps S16, S20, and S30 is omitted from FIG. 5 ,the configuration corresponding the omitted step can be omitted from thecontroller 72. In this modification, the controller 72 is configured tocontrol the electric actuator 48 so that the shift stage of thederailleur 22 approaches the predetermined shift stage or thetransmission ratio R approaches a predetermined transmission ratio RX ina case where the human-powered vehicle 10 is decelerated, configured tocontrol the electric actuator 48 and change the shift stage of thederailleur 22 one stage at a time in a case where the difference of thepredetermined shift stage and the present shift stage of the derailleur22 or the difference of the predetermined transmission ratio R and thepresent transmission ratio R is less than or equal to the predeterminedvalue, and configured to control the electric actuator 48 so as tocontinuously actuate the derailleur 22 over a plurality of shift stagesin a case where the difference of the predetermined shift stage and thepresent shift stage of the derailleur 22 or the difference of thepredetermined transmission ratio R and the present transmission ratio Rexceeds the predetermined value. Thus, the transmission ratio R ischanged in a preferred manner.

In this modification, in step S11, in a case where the human-poweredvehicle 10 is decelerated, the controller 72 determines that theshifting execution condition is satisfied. In step S15, the controller72 controls the electric actuator 48 so that the shift stage of thederailleur 22 approaches the predetermined shift stage or thetransmission ratio R approaches the predetermined transmission ratio RXin a case where the human-powered vehicle 10 is decelerated, andcontrols the electric actuator 48 and change the shift stage of thederailleur 22 one stage at a time in a case where the difference of thepredetermined shift stage and the present shift stage of the derailleur22 or the difference of the predetermined transmission ratio R and thepresent transmission ratio R is less than or equal to the predeterminedvalue, and controls the electric actuator 48 so as to continuouslyactuate the derailleur 22 over a plurality of shift stages in a casewhere the difference of the predetermined shift stage and the presentshift stage of the derailleur 22 or the difference of the predeterminedtransmission ratio R and the present transmission ratio R exceeds thepredetermined value. In step S11, for example, in a case wheredeceleration in a direction corresponding to the traveling direction ofthe human-powered vehicle 10 is greater than the predetermineddeceleration, the controller 72 can determine that the shiftingexecution condition is satisfied.

In the first embodiment, the second embodiment, a modification of thefirst embodiment, or a modification of the second embodiment, at leastone of steps S16, S20, and S30 can be omitted from FIG. 5 . In a casewhere at least one of steps S16, S20, and S30 is omitted from FIG. 5 ,the configuration corresponding the omitted step can be omitted from thecontroller 72. In this modification, the controller 72 is configured tocontrol the electric actuator 48 so that the fifth time T5 during whichthe derailleur 22 is actuated over a plurality of shift stages in a casewhere the vehicle speed V of the human-powered vehicle 10 is less thanor equal to the predetermined fifth speed V5 becomes shorter than thesixth time T6 during which the derailleur 22 is actuated over aplurality of shift stages in a case where the vehicle speed V of thehuman-powered vehicle 10 exceeds the predetermined fifth speed V5.

In this modification, in step S15 shown FIG. 5 , the controller 72controls the electric actuator 48 so that the fifth time T5 during whichthe derailleur 22 is actuated over a plurality of shift stages in a casewhere the vehicle speed V of the human-powered vehicle 10 is less thanor equal to the predetermined fifth speed V5 becomes shorter than thesixth time T6 during which the derailleur 22 is actuated over aplurality of shift stages in a case where the vehicle speed V of thehuman-powered vehicle 10 exceeds the predetermined fifth speed V5. Thus,the transmission ratio R is changed in a preferred manner.

In the first embodiment, the second embodiment, a modification of thefirst embodiment, or a modification of the second embodiment, thecontroller 72 can execute the process in the flowchart illustrated inFIG. 6 , and the entire process in the flowchart illustrated in FIG. 5can be omitted. In a case where the process shown in FIG. 5 is omitted,the configuration corresponding the omitted step can be omitted from thecontroller 72. In this modification, the control device 70 includes thecontroller 72 configured to control the electric actuator 48 and themotor 24 and receive a signal for adjusting the position of thederailleur 22. The controller 72 is configured to control the motor 24and drive the motor 24 in a case where the signal for adjusting theposition of the derailleur 22 is received, and is configured to controlthe electric actuator 48 so that the position of the derailleur 22corresponds to the first transmission ratio R1 in a case where the firsttransmission ratio R1 corresponding to the rotational speed of the motor24 and the rotational speed NW of the wheel 16 does not correspond tothe present position of the derailleur 22. Thus, the transmission ratioR is changed in a preferred manner.

In the first embodiment, the second embodiment, a modification of thefirst embodiment, or a modification of the second embodiment, the entireprocess in the flowchart illustrated in FIG. 5 and the entire process inthe flowchart illustrated in FIG. 6 can be omitted from theconfiguration of the controller 72. In a case where the process shown inFIG. 5 is omitted, the configuration corresponding the omitted step canbe omitted from the controller 72. In this modification, the controller72 is configured to control the electric actuator 48 using electricpower of the power storage device 66. Thus, the transmission ratio R ischanged in a preferred manner.

In the first embodiment, the second embodiment, a modification of thefirst embodiment, or a modification of the second embodiment, thecontroller 72 does not have to execute step S13 in the flowchartillustrated in FIG. 5 . In a case where step S13 is omitted from FIG. 5, the configuration corresponding to the omitted step can be omittedfrom the controller 72. In this case, in the flowchart illustrated inFIG. 5 , in a case where an affirmative determination is made in stepS10, the controller 72 can proceed to step S20 or S19. In the flowchartillustrated in FIG. 5 , after executing step S12, the controller 72 canproceed to one of steps S20 and S19 in accordance with a conditiondifferent from the predetermined condition related to pedaling.

Further, in this modification, at least one of steps S16, S20, and S30can be omitted from FIG. 5 , and in step S14 shown in FIG. 5 , thecontroller 72 can control the motor 24 to drive the transmission body 20with the motor 24 using a configuration differing from configurations(A1), (A2), (A3), and (A4). In the third embodiment or a modification ofthe third embodiment, the controller 72 does not have to execute stepS13 in the flowchart illustrated in FIG. 10 . In a case where step S13is omitted from FIG. 10 , the configuration corresponding to the omittedstep can be omitted from the controller 72. In this case, in theflowchart illustrated in FIG. 10 , in a case where an affirmativedetermination is made in step S51, the controller 72 proceeds to stepS20.

Further, in a modification in which step S13 is omitted from theflowchart illustrated in FIG. 10 , at least one of steps S16 and S20 canbe omitted from FIG. 10 , and in step S14, the controller 72 can controlthe motor 24 and drive the transmission body 20 with the motor 24 usinga configuration differing from configurations (A1), (A2), (A3), and(A4). In a modification in which step S13 is omitted from FIG. 5 and amodification in which step S13 is omitted from FIG. 10 , the motor 24 ofthe power transmission system 60 is configured to drive the transmissionbody 20 and generate electric power by being driven by the transmissionbody 20, the power storage device 66 is configured to store the electricpower generated by the motor 24, and the control device 70 is configuredto control the motor 24 using electric power of the power storage device66. Thus, the transmission ratio R is changed in a preferred manner.

In the first embodiment, the second embodiment, a modification of thefirst embodiment, or a modification of the second embodiment, the motor24 can be configured not to apply a propulsion force to thehuman-powered vehicle 10 in correspondence with the human driving forceH.

In the first embodiment, the second embodiment, a modification of thefirst embodiment, or a modification of the second embodiment, instead ofexecuting step S17 in the flowchart illustrated in FIG. 5 , thecontroller 72 can determine whether a predetermined time elapses fromthe time of driving the motor 24. Information related to predeterminedtime T is stored in the storage 74. In a case where the predeterminedtime T has elapsed from the time of driving the motor 24, the controller72 proceeds to step S18. The predetermined time T can be fixed or can bechanged in accordance with at least one of the present transmissionratio R and the target transmission ratio R. Information related topredetermined time T is stored in the storage 74.

The controller 72 repeats step S17 until the predetermined time Telapses from the time of driving the motor 24. In the third embodimentor a modification of the third embodiment, the controller 72 candetermine whether the predetermined time elapses from the time ofdriving the motor 24 instead of executing step S57 in the flowchartillustrated in FIG. 10 . In a case where the predetermined time T haselapsed from the time of driving the motor 24, the controller 72proceeds to step S18. The predetermined time T can be fixed or can bechanged in accordance with at least one of the present transmissionratio R and the target transmission ratio R. The controller 72 repeatsstep S57 until the predetermined time T elapses from the time of drivingthe motor 24.

In this specification, the phrase “at least one of” as used in thisdisclosure means “one or more” of a desired choice. As one example, thephrase “at least one of” as used in this disclosure means “only onechoice” or “both of two choices” in a case where the number of choicesis two. In another example, in this specification, the phrase “at leastone of” as used in this disclosure means “only one single choice” or“any combination of equal to or more than two choices” if the number ofits choices is equal to or more than three.

What is claimed is:
 1. A control device for a human-powered vehicleincluding a crank axle, a first rotational body connected to the crankaxle, a wheel, a second rotational body connected to the wheel, atransmission body engaged with the first rotational body and the secondrotational body to transmit driving force between the first rotationalbody and the second rotational body, a derailleur configured to operatethe transmission body to change a transmission ratio of a rotationalspeed of the wheel to a rotational speed of the crank axle, a motorconfigured to drive the transmission body, and an electric actuatorconfigured to operate the derailleur, the control device comprising: anelectronic configured to control the electric actuator and the motor,the electronic controller being configured to control the electricactuator and drive the transmission body with the motor so that thetransmission ratio is changed in a predetermined shifting range in upondetermining the derailleur has been actuated to change the transmissionratio and a predetermined condition related to pedaling is satisfied. 2.The control device according to claim 1, wherein the predeterminedshifting range includes a range that is less than or equal to apredetermined third transmission ratio, and the predetermined thirdtransmission ratio is less than a maximum one of the transmission ratiothat is changeable by the derailleur.
 3. The control device according toclaim 2, wherein the electronic controller is configured to control theelectric actuator and drive the transmission body with the motor so thatthe transmission ratio is changed in a predetermined shifting range inat least one of a case where the derailleur is actuated to change thetransmission ratio, the predetermined condition related to pedaling issatisfied, and a road on which the human-powered vehicle travels changesfrom an uphill to a downhill, and a case where the derailleur isactuated to change the transmission ratio, the predetermined conditionrelated to pedaling is satisfied, and a vehicle speed of thehuman-powered vehicle changes from an increasing state to a decreasingstate.
 4. The control device according to claim 1, wherein thepredetermined shifting range includes a range that is greater than orequal to a predetermined fourth transmission ratio, and thepredetermined fourth transmission ratio is greater than a minimum one ofthe transmission ratio that is changeable by the derailleur.
 5. Thecontrol device according to claim 4, wherein the electronic controlleris configured to control the electric actuator and drive thetransmission body with the motor so that the transmission ratio ischanged in the predetermined shifting range in at least one of a casewhere the derailleur has been actuated to change the transmission ratio,the predetermined condition related to pedaling is satisfied, and avehicle speed of the human-powered vehicle is less than or equal to asixth speed, and a case where the derailleur has been actuated to changethe transmission ratio, the predetermined condition related to pedalingis satisfied, and the rotational speed of the crank axle of thehuman-powered vehicle is less than or equal to a third rotational speed.6. The control device according to claim 1, wherein the electroniccontroller is configured to be switchable between a first shifting mode,in which the electronic controller controls the electric actuator inaccordance with a state of the human-powered vehicle, and a secondshifting mode, in which the electronic controller controls the electricactuator in accordance with operation of a transmission operating deviceprovided on the human-powered vehicle, the electronic controller isconfigured to be switchable between a third mode and a fourth mode inthe first shifting mode, in the third mode, the electronic controller isconfigured to control the motor and drive the transmission body inaccordance with the state of the human-powered vehicle upon determiningthe derailleur has been actuated to change the transmission ratio andthe predetermined condition related to pedaling is satisfied, and in thefourth mode, the electronic controller is configured to control themotor so as not to drive the transmission body even upon determining thederailleur has been actuated to change the transmission ratio and thepredetermined condition related to pedaling is satisfied.
 7. The controldevice according to claim 1, wherein the electronic controller isconfigured to control the motor and the electric actuator so thatrelative movement of the derailleur and at least one of the firstrotational body and the second rotational body is started simultaneouslyas the motor is driven or before the motor is driven upon determiningthe electric actuator and the motor are controlled to change thetransmission ratio and a predetermined condition related to pedaling issatisfied.
 8. The control device according to claim 1, wherein theelectronic controller is configured to control the motor and drive thetransmission body with the motor upon determining the derailleur hasbeen actuated to change the transmission ratio and the predeterminedcondition related to pedaling is satisfied; the electronic controller isconfigured to control the electric actuator so that a shift stage of thederailleur approaches a predetermined shift stage or the transmissionratio approaches a predetermined transmission ratio upon determining thehuman-powered vehicle is decelerated; the electronic controller isconfigured to control the electric actuator and change the shift stageof the derailleur one stage at a time upon determining either adifference of the predetermined shift stage and a present shift stage ofthe derailleur or a difference of the predetermined transmission ratio,and the present transmission ratio is less than or equal to apredetermined value; and the electronic controller is configured tocontrol the electric actuator so as to continuously actuate thederailleur over a plurality of shift stages upon determining either adifference of the predetermined shift stage and a present shift stage ofthe derailleur or a difference of the predetermined transmission ratio,and the present transmission ratio exceeds the predetermined value. 9.The control device according to claim 1, wherein the predeterminedcondition related to pedaling is satisfied in at least one of a casewhere a human driving force input to the crank axle is less than orequal to a predetermined driving force, a case where a rotational speedof the crank axle is less than or equal to a second rotational speed,and a case where the crank axle is oscillating.
 10. The control deviceaccording to claim 1, wherein the electronic controller is configured tocontrol the motor to apply a propulsion force to the human-poweredvehicle in accordance with a human driving force, and the electroniccontroller is configured to drive the transmission body so as not toapply the propulsion force to the human-powered vehicle upon determiningthe derailleur has been actuated to change the transmission ratio andthe predetermined condition related to pedaling is satisfied.
 11. Apower transmission system comprising the control device according toclaim 1, the power transmission system further comprising: a firstone-way clutch provided in a first power transmission path between thecrank axle and the first rotational body and configured to transmitrotational force from the crank axle to the first rotational body in afirst rotational direction and restrict transmission of rotational forcefrom the first rotational body to the crank axle in the first rotationaldirection.
 12. The power transmission system according to claim 11,further comprising: a second one-way clutch provided in a second powertransmission path between the second rotational body and the wheel andconfigured to transmit rotational force from the second rotational bodyto the wheel in a second rotational direction corresponding to the firstrotational direction and restrict transmission of rotational force fromthe wheel to the second rotational body in the second rotationaldirection.
 13. A control device for a human-powered vehicle includingthe human-powered vehicle includes a crank axle, a first rotational bodyconnected to the crank axle, a wheel, a second rotational body connectedto the wheel, a transmission body engaged with the first rotational bodyand the second rotational body to transmit driving force between thefirst rotational body and the second rotational body, a derailleurconfigured to operate the transmission body to change a transmissionratio of a rotational speed of the wheel to a rotational speed of thecrank axle, a motor configured to drive the transmission body, and anelectric actuator configured to operate the derailleur, the controldevice comprising: an electronic configured to control the electricactuator and the motor, the electronic controller being configured to beswitchable between a first shifting mode, in which the electroniccontroller controls the electric actuator in accordance with a state ofthe human-powered vehicle, and a second shifting mode, in which theelectronic controller controls the electric actuator in accordance withoperation of a transmission operating device provided on thehuman-powered vehicle, the electronic controller being configured to beswitchable between a third mode and a fourth mode while in the firstshifting mode, in the third mode, the electronic controller isconfigured to control the motor and drive the transmission body inaccordance with the state of the human-powered vehicle upon determiningthe derailleur has been actuated to change the transmission ratio and apredetermined condition related to pedaling is satisfied, and in thefourth mode, the electronic controller is configured to control themotor so as not to drive the transmission body even upon determining thederailleur has been actuated to change the transmission ratio and thepredetermined condition related to pedaling is satisfied.
 14. Thecontrol device according to claim 13, wherein the electronic controlleris configured to control the motor and the electric actuator so thatrelative movement of the derailleur and at least one of the firstrotational body and the second rotational body is started simultaneouslyas the motor is driven or before the motor is driven upon determiningthe electric actuator and the motor are controlled to change thetransmission ratio and a predetermined condition related to pedaling issatisfied.
 15. The control device according to claim 13, wherein theelectronic controller is configured to control the motor and drive thetransmission body with the motor upon determining the derailleur hasbeen actuated to change the transmission ratio and the predeterminedcondition related to pedaling is satisfied; the electronic controller isconfigured to control the electric actuator so that a shift stage of thederailleur approaches a predetermined shift stage or the transmissionratio approaches a predetermined transmission ratio upon determining thehuman-powered vehicle is decelerated; the electronic controller isconfigured to control the electric actuator and change the shift stageof the derailleur one stage at a time upon determining either adifference of the predetermined shift stage and a present shift stage ofthe derailleur or a difference of the predetermined transmission ratio,and the present transmission ratio is less than or equal to apredetermined value; and the electronic controller is configured tocontrol the electric actuator so as to continuously actuate thederailleur over a plurality of shift stages upon determining either adifference of the predetermined shift stage and a present shift stage ofthe derailleur or a difference of the predetermined transmission ratio,and the present transmission ratio exceeds the predetermined value. 16.The control device according to claim 13, wherein the predeterminedcondition related to pedaling is satisfied in at least one of a casewhere a human driving force input to the crank axle is less than orequal to a predetermined driving force, a case where a rotational speedof the crank axle is less than or equal to a second rotational speed,and a case where the crank axle is oscillating.
 17. The control deviceaccording to claim 13, wherein the electronic controller is configuredto control the motor to apply a propulsion force to the human-poweredvehicle in accordance with a human driving force, and the electroniccontroller is configured to drive the transmission body so as not toapply the propulsion force to the human-powered vehicle upon determiningthe derailleur has been actuated to change the transmission ratio andthe predetermined condition related to pedaling is satisfied.
 18. Apower transmission system comprising the control device according toclaim 13, the power transmission system further comprising: a firstone-way clutch provided in a first power transmission path between thecrank axle and the first rotational body and configured to transmitrotational force from the crank axle to the first rotational body in afirst rotational direction and restrict transmission of rotational forcefrom the first rotational body to the crank axle in the first rotationaldirection.
 19. The power transmission system according to claim 18,further comprising: a second one-way clutch provided in a second powertransmission path between the second rotational body and the wheel andconfigured to transmit rotational force from the second rotational bodyto the wheel in a second rotational direction corresponding to the firstrotational direction and restrict transmission of rotational force fromthe wheel to the second rotational body in the second rotationaldirection.
 20. A control device for a human-powered vehicle includingthe human-powered vehicle includes a crank axle, a first rotational bodyconnected to the crank axle, a wheel, a second rotational body connectedto the wheel, a transmission body engaged with the first rotational bodyand the second rotational body to transmit driving force between thefirst rotational body and the second rotational body, a derailleurconfigured to operate the transmission body to change a transmissionratio of a rotational speed of the wheel to a rotational speed of thecrank axle, an electric actuator configured to operate the derailleur,and a motor configured to drive the transmission body, the controldevice comprising: an electronic configured to control the electricactuator and the motor, the electronic controller being configured tocontrol the motor and drive the transmission body with the motor upondetermining the derailleur has been actuated to change the transmissionratio and a predetermined condition related to pedaling is satisfied,and the electronic controller being configured to control the electricactuator so that the transmission ratio does not increase upondetermining a vehicle speed of the human-powered vehicle is greater thanor equal to a second speed or the rotational speed of the wheel isgreater than or equal to a predetermined rotational speed.
 21. Thecontrol device according to claim 20, wherein the electronic controlleris configured to control the electric actuator so as not to change thetransmission ratio until a first condition related to shifting issatisfied in a case where the derailleur is actuated.
 22. The controldevice according to claim 20, wherein the electronic controller isconfigured to control the motor and the electric actuator so thatrelative movement of the derailleur and at least one of the firstrotational body and the second rotational body is started simultaneouslyas the motor is driven or before the motor is driven upon determiningthe electric actuator and the motor are controlled to change thetransmission ratio and a predetermined condition related to pedaling issatisfied.
 23. The control device according to claim 20, wherein theelectronic controller is configured to control the motor and drive thetransmission body with the motor upon determining the derailleur hasbeen actuated to change the transmission ratio and the predeterminedcondition related to pedaling is satisfied; the electronic controller isconfigured to control the electric actuator so that a shift stage of thederailleur approaches a predetermined shift stage or the transmissionratio approaches a predetermined transmission ratio upon determining thehuman-powered vehicle is decelerated; the electronic controller isconfigured to control the electric actuator and change the shift stageof the derailleur one stage at a time upon determining either adifference of the predetermined shift stage and a present shift stage ofthe derailleur or a difference of the predetermined transmission ratio,and the present transmission ratio is less than or equal to apredetermined value; and the electronic controller is configured tocontrol the electric actuator so as to continuously actuate thederailleur over a plurality of shift stages upon determining either adifference of the predetermined shift stage and a present shift stage ofthe derailleur or a difference of the predetermined transmission ratio,and the present transmission ratio exceeds the predetermined value. 24.The control device according to claim 20, wherein the predeterminedcondition related to pedaling is satisfied in at least one of a casewhere a human driving force input to the crank axle is less than orequal to a predetermined driving force, a case where a rotational speedof the crank axle is less than or equal to a second rotational speed,and a case where the crank axle is oscillating.
 25. The control deviceaccording to claim 20, wherein the electronic controller is configuredto control the motor to apply a propulsion force to the human-poweredvehicle in accordance with a human driving force, and the electroniccontroller is configured to drive the transmission body so as not toapply the propulsion force to the human-powered vehicle upon determiningthe derailleur has been actuated to change the transmission ratio andthe predetermined condition related to pedaling is satisfied.
 26. Apower transmission system comprising the control device according toclaim 20, the power transmission system further comprising: a firstone-way clutch provided in a first power transmission path between thecrank axle and the first rotational body and configured to transmitrotational force from the crank axle to the first rotational body in afirst rotational direction and restrict transmission of rotational forcefrom the first rotational body to the crank axle in the first rotationaldirection.
 27. The power transmission system according to claim 26,further comprising: a second one-way clutch provided in a second powertransmission path between the second rotational body and the wheel andconfigured to transmit rotational force from the second rotational bodyto the wheel in a second rotational direction corresponding to the firstrotational direction and restrict transmission of rotational force fromthe wheel to the second rotational body in the second rotationaldirection.